Sustainability

Climate Change

International Students

department of mechanical and industrial engineering

U of T Mississauga

Undergraduate Students

Subheadline

“What’s happening at UTM is truly inspiring, and it’s an honour to spread awareness about it in the global community”

When Vera Allue learned that she would represent the ��߲ݴ�ý Mississauga at COP29 in Azerbaijan, it reaffirmed her belief that she made the right choice as an international student dedicated to climate action.

A first-year student from Spain, Allue says she didn’t realize the scale of U of T’s leadership in sustainability until she came to the university.

“I knew everything here was very modern, and I noticed all the small but important ways that the campus promotes sustainability in areas like waste management and food services – but I didn’t know about the systems and infrastructure behind it,” says Allue, who is pursuing a double major in economics and political science with a minor in environmental law and policy.

“Then I read UTM’s [Climate Positive Plan] to achieve carbon-neutrality by 2043.”

The plan, which includes a commitment – adopted by all three campuses – to become climate-positive by 2050, is one of several initiatives that Allue will spread the word about at the 29th United Nations Climate Change Conference, beginning Nov. 11 and ending Nov. 22.

She’s also going to showcase U of T Mississauga’s local strategies to address climate change, in addition to its array of educational and research programs on environmental issues – efforts that have contributed to U of T being named the most sustainable university in the world in the 2024 QS World University Rankings.

“What’s happening at UTM is truly inspiring, and it’s an honour to spread awareness about it in the global community,” says Allue, who also looks forward to sharing her learnings from the conference with the U of T Mississauga community when she returns.

For Allue, attending the pre-eminent global gathering on climate change is a culmination of her efforts to engage with and raise awareness about climate issues.

When she was only 15 years old, she started a recycling and wastewater project in her hometown of Soria in northern Spain. “I wanted to educate my peers about what they could do, because climate action is often perceived as something that belongs to powerful stakeholders,” she says.

Allue has also been involved with several international organizations that encourage youth to participate in politics and civil society, with a strong focus on environmental issues: she’s currently a European Union (EU) Young European Ambassador and a member of the European Youth Energy Network, which she will also represent at COP29.

Vera Allue started a recycling and wastewater management project in her community when she was 15 (photo by Nick Iwanyshyn)

During her short time at U of T, Allue has gotten involved in several sustainability initiatives, including the UTM Sustainability Ambassador program and the Student Association for Geography, Geomatics and the Environment (SAGE).

She says the support she has received from U of T Mississauga’s Sustainability Office in attending COP29 is proof of the university’s steadfast belief in students’ potential to effect change.

“What I'm really looking forward to is bringing to COP29 the sense of belonging and pride that I feel in UTM’s climate action,” says Allue.

“When I first started contributing to the environmental field, I felt like my voice was barely heard. Now I feel so much optimism because I’ve found spaces like UTM that actively encourage young people to speak up and participate.”

U of T experts use machine learning to analyze where bike lanes should be located for maximum benefit

Christopher.Sorensen — Wed, 23 Oct 2024 14:07:11 +0000

U of T experts use machine learning to analyze where bike lanes should be located for maximum benefit

Christopher.Sorensen Wed, 10/23/2024 - 10:07

Cutline

Researchers from U of T's Faculty of Applied Science & Engineering used novel computing approaches to compare utilitarian and equity-driven approaches toward expansion of protected bike lanes (photo by Michelle Mengsu Chang/Toronto Star via Getty Images)

Tyler Irving

Topic

Breaking Research

Artificial Intelligence

Cities

Subheadline

“If you optimize for equity, you get a map that is more spread out and less concentrated in the downtown areas"

A team of researchers from the department of civil and mineral engineering in the ��߲ݴ�ý’s Faculty of Applied Science & Engineering are wielding machine learning to understand where cycling infrastructure should be located in order to benefit the most people.

In a paper published in the Journal of Transport Geography, researchers used novel computing approaches to compare two strategies for expansion of protected bike lanes – using Toronto as a model.

“Right now, some people have really good access to protected biking infrastructure: they can bike to work, to the grocery store or to entertainment venues,” says post-doctoral fellow and lead author Madeleine Bonsma-Fisher, who previously researched interactions between bacteria and viruses before applying her data analysis skills to active transportation. “More lanes could increase the number of destinations they can reach, and previous work shows that will increase the number of cycle trips taken.

“However, many people have little or no access to protected cycling infrastructure at all, limiting their ability to get around. This raises a question: is it better to maximize the number of connected destinations and potential trips overall, or is it more important to focus on maximizing the number of people who can benefit from access to the network?”

To delve into the question, Bonsma-Fisher and co-authors used machine learning and optimization, a challenge that required them to explore new computational approaches.

“This kind of optimization problem is what’s called an ‘NP-hard’ problem, which means that the computing power needed to solve it scales very quickly along with the size of the network,” says Shoshanna Saxe¸ associate professor in the department of civil and mineral engineering and one of Bonsma-Fisher’s two co-supervisors alongside Professor Timothy Chan of the department of mechanical and industrial engineering. “If you used a traditional optimization algorithm on a city the size of Toronto, everything would just crash.”

To get around the problem, PhD student Bo Lin invented a machine learning model capable of considering millions of combinations of over a thousand different infrastructure projects in order to test where the most impactful places are to build new cycling infrastructure.

Using Toronto as a stand-in for any large, automobile-oriented North American city, the team generated maps of future bike lane networks along major streets, optimized according to two broad types of strategies.

The first strategy, dubbed the utilitarian approach, focused on maximizing the number of trips that could be taken using only routes with protected bike lanes in under 30 minutes – without regard for who those trips were taken by.

The second, an equity-based strategy, sought to maximize the number of people who had at least some connection to the network.

“If you optimize for equity, you get a map that is more spread out and less concentrated in the downtown areas,” says Bonsma-Fisher. “You do get more parts of the city that have a minimum of accessibility by bike, but you also get a somewhat smaller overall gain in average accessibility.”

This results in a trade-off, says Saxe. “This trade-off is temporary, assuming we will eventually have a full cycling network across the city, but it is meaningful for how we do things in the meantime and could last a long time given ongoing challenges to building cycling infrastructure.”

Another key finding was that certain routes appeared to be essential no matter what strategy was pursued – for example, protected bike lanes along Bloor Street West.

“Those bike lanes benefit even people who don’t live near them and are a critical trunk to maximizing both the equity and utility of the bike network. Their impact is so consistent across models that it challenges the idea that bike lanes are a local issue, affecting only the people close by,” Saxe says. “Optimized infrastructure repeatedly turns out in our model to serve neighbourhoods quite a distance away.”

The team is already sharing their data with Toronto’s city planners to help inform ongoing decisions about infrastructure investments. Going forward, the researchers hope to apply their analysis to other cities as well.

“No matter what your local issues or what choices you end up making, it’s really important to have a clear understanding of what goals you are aiming for and check if you are meeting them,” says Bonsma-Fisher.

“This kind of analysis can provide an evidence-based, data-driven approach to answering these tough questions.”

Large-scale adoption of electric vehicles can lead to human health benefits: Study

Christopher.Sorensen — Mon, 21 Oct 2024 14:05:14 +0000

Large-scale adoption of electric vehicles can lead to human health benefits: Study

Christopher.Sorensen Mon, 10/21/2024 - 10:05

Cutline

Researchers from U of T's Faculty of Applied Science & Engineering used computer models to simulate the impact of large-scale adoption of electric vehicles in the U.S. (photo by: Plexi Images/Glasshouse Images/UCG/Universal Images Group via Getty Images)

Tyler Irving

Topic

Breaking Research

Research & Innovation

Subheadline

"Our simulation shows that the cumulative public health benefits of large-scale EV adoption between now and 2050 could run into the hundreds of billions of dollars"

Large-scale adoption of electric vehicles (EVs) could lead to significant health benefits for populations, according to a new study from the department of civil and mineral engineering in the ��߲ݴ�ý’s Faculty of Applied Science & Engineering.

Researchers used computer simulations to show that aggressive electrification of the U.S. vehicle fleet, coupled with an ambitious roll-out of renewable electricity generation, could result in health benefits worth between US$84 billion and 188 billion by 2050.

Even scenarios with less aggressive grid decarbonization mostly predicted health benefits running into the tens of billions of dollars.

“When researchers examine the impacts of EVs, they typically focus on climate change in the form of mitigating CO2 emissions,” says Professor Marianne Hatzopoulou, one of the co-authors of the study, which was published in PNAS.

“But CO2 is not the only thing that comes out of the tailpipe of an internal combustion vehicle. They produce many air pollutants that have a significant, quantifiable impact on public health. Furthermore, evidence shows that those impacts are disproportionately felt by populations that are low-income, racialized or marginalized.”

The research team previously used their expertise in life-cycle assessment to build computer models that simulated the impact of large-scale EV adoption in the U.S. market.

Among other things, they showed that while EV adoption will have a positive impact on climate change, it is not sufficient on its own to meet the Paris Agreement targets. They recommended that EV adoption be used in combination with other strategies, such as investments in public transit, active transportation and higher housing density.

In their latest study, the team sought to account for the non-climate benefits of EV adoption. They adapted their models to simulate the production of air pollutants that are common in fossil fuel combustion, such as nitrogen oxides, sulphur oxides and small particles known as PM2.5.

“Modelling these pollutants is very different from modelling CO2, which lasts for decades and ends up well-mixed throughout the atmosphere,” says study co-author Daniel Posen, an associate professor in the department of civil and mineral engineering.

“In contrast, these pollutants, and their associated health impacts, are more localized. It matters not only how much we are emitting, but also where we emit them.”

While EVs do not produce tailpipe emissions, they can still be responsible for air pollution if the power plants that supply them run on fossil fuels. This also has the effect of displacing air pollution from busy highways to the communities that live near those power plants.

Another complication is that neither the air pollution from the power grid nor that from internal combustion vehicles is expected to stay constant over time.

“Today’s gasoline-powered cars produce a lot less pollution than those that were built 20 years ago, many of which are still on the road,” says Jean Schmitt, post-doctoral fellow and lead author of the study.

“So, if we want to fairly compare EVs to internal combustion vehicles, we have to account for the fact that air pollution will still go down as these older vehicles get replaced. We can also see that the power grid is getting greener over time, as more renewable generation gets installed.”

The team, which also included Professor Heather MacLean of the department of civil and mineral engineering and Amir F. N. Abdul-Manan of Saudi Aramco’s Strategic Transport Analysis Team, chose two primary scenarios to simulate to the year 2050. In the first, they assumed that no more EVs will be built, but that older internal combustion vehicles will continue to be replaced with newer, more efficient ones.

In the second scenario, they assumed that by 2035, all new vehicles sold will be electric. The researchers described this as “aggressive,” but it is in line with the stated intentions of many countries. For example, Norway plans to eliminate sales of non-electric vehicles next year, and Canada plans to follow suit by 2035.

For each of these scenarios, they also considered various rates for the transition of the electric grid to low-emitting and renewable energy sources.

Under each set of conditions, the team simulated air pollution levels across the U.S. and used calculations commonly used by epidemiologists, actuaries and policy analysts to correlate pollution levels with statistical estimates of the number of years of life lost, as well as with estimates of economic value.

“Our simulation shows that the cumulative public health benefits of large-scale EV adoption between now and 2050 could run into the hundreds of billions of dollars,” says Posen.

“That’s significant, but another thing we found is that we only get these benefits if the grid continues to get greener. We are already transitioning away from fossil fuel power generation, and it’s likely to continue in the future. But for the sake of argument, we modelled what would happen if we artificially freeze the grid in its current state.

“In that case, we’d actually be better off simply replacing our old internal combustion vehicles with new ones – but again, this is not a very realistic scenario.”

This finding raises the question of whether it’s more important to decarbonize the transportation sector through EV adoption, or to first decarbonize the power generation sector that’s the ultimate source of pollution associated with EVs.

To that, Hatzopoulou notes that vehicles sold today will continue to be used for decades. “If we buy more internal combustion vehicles now, however efficient they may be, we will be locking ourselves into those tailpipe emissions for years to come, and they will spread that pollution everywhere there are roads,” she says. “We still need to decarbonize the power generation system – and we are – but we should not wait until that process is complete to get more EVs on the road.

“We need to start on the path to a healthier future today.”

U of T researcher tracks 1,000 years of sea ice

Christopher.Sorensen — Tue, 15 Oct 2024 17:18:44 +0000

U of T researcher tracks 1,000 years of sea ice

Christopher.Sorensen Tue, 10/15/2024 - 13:18

Cutline

Minoli Dias, a PhD student at U of T Mississauga, examines coralline algae, which live for approximately 1,500 years and grow in annual layers, to construct a record of changes in sea ice cover over time (photo by Natasha Leclerc)

Topic

Research & Innovation

U of T Mississauga

Subheadline

Minoli Dias says the baseline data she and her fellow researchers are constructing could "inform model projections that predict what future conditions will look like”

Minoli Dias’s interest in sea ice began in an unlikely place: polar bear poop.

She was studying microplastics in polar bear feces and intestinal tracts as part of a research project during her undergraduate years at Queen’s University.

“It was a smelly job, but it was really interesting,” says Dias, who is now a PhD student in the department of Earth sciences at U of T Mississauga.

Her early work revealed some troubling trends: for instance, declining sea ice levels meant that certain species of polar bears were being driven inland – with garbage and landfills increasingly serving as their food sources. At the same time, members of northern communities, particularly the Inuit, had noted in their own experiences, observations and research that declining sea ice levels had impacted access to essential needs – such as transportation, food security through hunting, and other culturally important activities.

It wasn't long before Dias decided she wanted to pursue sea ice research – and ultimately chose to study at U of T Mississauga after speaking with Jochen Halfar, a paleoclimate and paleontology professor and researcher in U of T Mississauga’s Climate Geology Research Group. “UTM gave him a wonderful lab, and we have incredible facilities. But his research and his passion for the work was what really drew me,” she says.

Now part of Halfar’s research group studying changes in sea ice cover in northern Labrador, Dias and her co-researchers are developing sea-ice cover records for the past 1,000 years off the coast of Nunatsiavut and are examining coralline algae as part of their research.

Minoli Dias's view from the research vessel off the coast of Newfoundland and Labrador (photo by Minoli Dias)

Dias says that coralline algae live for approximately 1,500 years and they grow in annual layers (like tree rings). The growth, she explains, is dependent on light. When the algae have more light, meaning there’s less sea ice in the water, they grow a lot thicker. When they have less light, meaning there’s more sea ice cover, the layers grow thinner. By examining these variations and growth over time along with chemical tracers, the research team can essentially watch the sea ice cover change.

Dias conducted field work in the community of Agvituk (Hopedale), N.L. this past summer. The lab also explored multiple sites in Greenland, Norway, Nunavut and the Labrador coast.

“If we can create a network of these types of ocean reconstructions, we’ll be able to have this baseline data going back several centuries that can then hopefully inform model projections that predict what future conditions will look like,” she says.

Since joining the lab, Dias says she has had some incredible experiences – including a recent opportunity to work with members of the Hopedale community.

“We’re not the experts. We don’t live there. It’s the people who live along the coast – and actually live the change and see the change – who are the experts,” she says. “When you speak to community members, they have a clear understanding of how changes occurred over time, and what is the importance of sea ice to these ecosystems.”

Once she completes her PhD, Dias hopes to continue pursuing climate research by either working directly with impacted communities or working to address the effects of pollution or climate change.

Dias says she feels inspired by the many women scientists who came before her, including her female professors who have served as role models in what traditionally has been a male-dominated field.

“They paved the way for us to be able to do the work that we do, and to do it in relative comfort,” she says. “Having these women to look up to is what makes it possible for me to do the type of work that I do, and I hope I can make a similar contribution and pay it forward to the women that are coming after me.”

Harmony Commons becomes Canada's largest building with passive house certification

Christopher.Sorensen — Wed, 25 Sep 2024 16:57:52 +0000

Harmony Commons becomes Canada's largest building with passive house certification

Christopher.Sorensen Wed, 09/25/2024 - 12:57

Cutline

U of T Scarborough’s Harmony Commons residence is the largest passive house-certified building in Canada and the largest passive house dormitory in the world (photo by Ruilin Yuan)

U of T Scarborough Staff

Topic

department of mechanical and industrial engineering

U of T Scarborough

Subheadline

The 746-bed student residence at U of T Scarborough touted as “an example to the world of what Canada is doing in high-performance buildings”

The Harmony Commons student residence is already turning heads at the ��߲ݴ�ý Scarborough thanks to its eye-catching design and comfortable living spaces – but its biggest impact may well be in the realm of sustainability.

The building, which first opened its doors to students last year, recently received passive house certification from the Passive House Institute during a recent ceremony on campus. The certification is given to buildings that exhibit exceptional energy efficiency, particularly when it comes to heating and cooling.

Harmony Commons now has the distinction of being the largest passive-certified building in Canada and largest passive house dormitory in the world.

“This is an example to the world of what Canada is doing in high-performance buildings,” said Chris Ballard, president and CEO of Passive House Canada.

“It’s a beacon to institutions and governments around the world that passive house buildings on this scale are doable.”

Harmony Commons received a passive house classic certification during a ceremony on Sept. 18 (photo by Ruilin Yuan)

Passive house construction is generally achieved through an airtight and well-insulated envelope that prevents heat from escaping, allowing buildings with the designation to consume up to 90 per cent less energy compared to conventional structures.

“The responsibility of sustainability falls on everybody,” said Andrew Arifuzzaman, U of T Scarborough’s chief administration and strategy officer.

“We have expertise in building technologies and systems, but if we’re putting up conventional buildings and not driving innovation, then we’re falling short.

“It became clear that this type of building concept made sense and aligned closely with our values.”

The first group of students moved into the nine-storey, 746-bed residence in September 2023, marking the first dormitory-style residence at U of T Scarborough. In keeping with passive house standards, Harmony Commons is well-ventilated and has better air flow than conventional buildings – with the improved air quality intended to help with sleeping and studying.

One of the building’s key innovations is that heat captured from various systems, including exhaust air from kitchens and showers, is used to heat spaces throughout the structure.

In fact, the building is so efficient that the energy it uses to make more than 3,000 meals each day in its dorms and dining hall is less than that used by two average households.

Designed by Handel Architects, Harmony Commons is also fully electric. Since no fossil fuels are burned in heating and cooling the building, it has extremely low carbon emissions.

Harmony Commons has an airtight and well-insulated envelope that prevents heat from escaping. It's also well-ventilated with improved air flow compared to conventional buildings (photo by Tom Arban)

Patricia Escobar, manager of sustainability at U of T Scarborough, notes that typical buildings in Toronto rely on fossil-fuel-based heating systems, but Harmony Commons reduces the amount of heat needed to be generated in the first place.

“This results in significantly fewer greenhouse gas emissions, which supports our goal of becoming a climate positive campus,” she says.

While passive house certification is mostly attempted for small-scale buildings, applying the concepts to a building as large and complex as a dormitory-style residence came with a unique set of challenges – and opportunities.

Arifuzzaman says that building Harmony Commons effectively “de-risked” future large-scale passive house buildings.

“It shows the industry that this type of project can be done in this market and at this scale. It proves that passive house is an attainable standard for future large-scale developments,” he says.

He adds it also allowed many local people working in the trades to be trained in new construction methods for high-performance, sustainable buildings.

“This was a great opportunity to realize that you can contribute to reducing global climate change impact and still live a great quality of life,” he says.

Battery-powered EV chargers – co-developed at U of T – installed on St. George campus

rahul.kalvapalle — Fri, 20 Sep 2024 14:34:25 +0000

Battery-powered EV chargers – co-developed at U of T – installed on St. George campus

rahul.kalvapalle Fri, 09/20/2024 - 10:34

Cutline

The Level 3+ battery-powered EV charging stations are available in U of T's Landmark Garage, located beneath King's College Circle on the St. George campus (photo by Safa Jinje)

Safa Jinje

Topic

Breaking Research

Facilities and Services

Landmark

Subheadline

The rapid-charging stations were developed by Canadian EV tech company Jule in collaboration with experts at the Faculty of Applied Science & Engineering

The historic core of the ��߲ݴ�ý’s St. George campus is now home to a pair of next-generation electric vehicle (EV) charging stations that utilize technology co-developed at the university.

The two new stations use direct current (DC)-sourced EV chargers boasting integrated battery energy storage systems – novel technology that minimizes strain on the electrical grid.

Located in the Landmark Garage beneath King’s College Circle, the chargers are rated Level 3+, meaning they can charge EVs in under 30 minutes, and bring the total number of EV charging stations in the garage to 50.

The technology underpinning the new charges was developed by Jule, an energy storage and EV solutions company co-founded by Faculty of Applied Science & Engineering alumnus Carmine Pizzurro, in collaboration with U of T faculty members.

Jule embarked on its first research collaboration with U of T shortly after its founding in 2009, teaming up with the Centre for Applied Power Electronics led by Professor Reza Iravani at the Edward S. Rogers Sr. department of electrical and computer engineering.

It also worked closely with the city's electric utility.

“One of our first collaborations was with Toronto Hydro, which led to us being the first company in the world to put lithium-ion batteries on the distribution grid to provide backup power during outages and reduce stress on the grid during peak periods,” says Pizzurro, who earned his bachelor’s and master’s degrees in mechanical engineering at U of T.

Cristina Amon and Carlos Da Silva (fourth and fifth from left, respectively, in the front row) pose with students and staff in the Thermal Management Systems lab (photo by Aaron Demeter)

Pizzurro went on to install Jule’s first battery-powered fast chargers in northern Canada as part of a collaboration with Natural Resources Canada.

But the company needed to address a longstanding challenge with lithium-ion batteries: they’re temperature-sensitive and must be able to operate reliably in both hot and cold environments if they are to help power a net-zero future.

To tackle this issue, Jule in 2018 expanded its partnership with the Faculty of Applied Science & Engineering to include University Professor Cristina Amon and senior research associate Carlos Da Silva of the Advanced Thermofluids Optimization, Modelling and Simulation (ATOMS) laboratory in the department of mechanical and industrial engineering.

The ATOMS experts have been developing computational models and experimental characterization to optimize Jule’s battery thermal management systems – work that is being carried out in a state-of-the-art battery testing facility that received funding from the Canada Foundation for Innovation and Ontario Research Fund.

“Thermal management is an issue that impacts both aspects of Jule’s EV fast charging technology: the power electronics to enable the charging, as well as their unique integrated battery storage system,” says Da Silva, who is also executive director of the U of T Electrification Hub. “Thermal management is critical for mitigating battery degradation. It requires regulating the temperature in such a way that you keep the battery within an optimal range that will extend its life span.”

Jule’s fast chargers use energy stored in batteries, rather than drawing it directly from the electrical grid in the manner of traditional fast chargers. That means they don’t cause grid overloading during peak usage times and can be charged during off-peak hours when electricity is less costly; they also don’t require significant investments in electricity upgrades.

“The battery storage system is charged using current from the electrical grid, which is alternating current (AC); and then this larger battery, which uses direct current (DC), charges the smaller battery in the electric vehicle,” says Amon. “It is more efficient to fast-charge from a stationary battery to an EV – DC to DC – than it is to fast-charge an EV from the electrical grid, which requires converting AC to DC power.”

Jule’s Level 3+ charging station can provide up to 200 kilowatts of power output, yet only needs 45 kilowatts of input power. Amon says this rapid charging speed can help alleviate range anxiety among EV users: “Some drivers fear that EV batteries may not have enough energy to reach a desired destination. But if charging time is much closer to the time required to fill up a tank of a gas-powered car, that can reduce this worry.”

L-R: Professor Reza Iravani, Jule co-founder Carmine Pizzurro, U of T Electrification Hub Executive Director Carlos Da Silva, University Professor Cristina Amon and U of T Engineering Dean Christopher Yip (photo by Safa Jinje)

The Level 3+ stations are joining 48 Level 2 chargers that are already available for public use at the Landmark Garage.

This increases the campus’s charging capacity to over 25,000 charges per year, which can eliminate over 700 tons of greenhouse gas emissions, according to U of T’s Sustainability Office.

“Hosting these first-of-their-kind EV chargers right here on campus extends beyond providing a new and exciting sustainability service to our community,” says Ron Saporta, U of T’s chief operating officer, property services and sustainability. “It represents just one example of how we are supporting the intersection of research, learning and commercialization of sustainable innovations developed by members of our very own U of T community.”

The charging stations will also serve as a living lab to test future thermal innovations jointly developed by U of T Engineering researchers and Jule.

“Having these chargers on campus enables us to have a greater capacity to test the system in ways we are limited by doing in a lab setting,” says Da Silva.

Research project explores how urban agriculture can reduce emissions and increase access to food

Christopher.Sorensen — Thu, 19 Sep 2024 18:37:29 +0000

Research project explores how urban agriculture can reduce emissions and increase access to food

Christopher.Sorensen Thu, 09/19/2024 - 14:37

Cutline

Urban agriculture, including growing food on roof tops, may hold the key to cutting greenhouse gas emissions and increasing access to food in cities (photo by Don Campbell)

Topic

Subheadline

The $3.9-million TOsustain project brings together 15 researchers, including 11 from U of T, and partner organizations involved in food production, food distribution and land management

From raised garden beds under hydro corridors to apartment building roofs, researchers at the ��߲ݴ�ý say urban agriculture may hold the keys to improving access to different types of food in large cities while reducing greenhouse gas emissions.

“Urban areas have so much food-growing potential, but our knowledge about how, where and what kind of crops can be grown in and around cities is limited,” says Marney Isaac, a professor in the department of physical and environmental sciences and the department of global development studies at U of T Scarborough.

Marney Isaac takes measurements of soil carbon levels at the Burnhamthorpe Collegiate Institute (BCI) urban farm (submitted photo)

“We know even less about how well urban agriculture can capture and store carbon dioxide, a greenhouse gas that is a major contributor to climate change.”

To help answer these and other questions, Isaac will lead a multifaceted project with a team of researchers and partners from the private and public sector called TOsustain (Toward Sustainable Urban and Peri-urban Agriculture for Net-zero Food Systems). It is being supported by a $3.9-million grant from the NSERC- and SSHRC-funded Sustainable Agriculture Research Initiative.

The first task is to create an inventory of current and potential land for agriculture in urban and peri-urban (the land immediately surrounding urban areas) spaces across Greater Toronto. This includes smaller farms and large-scale growing operations, public lands, hydro corridors, community gardens, green roofs and unused green spaces.

The project will also look at measuring the amount of greenhouse gas (GHG) emissions urban agricultural land can potentially trap and store and identifying farm management practices that can reduce GHG emissions. It will also include research that looks at regulations and policies that either constrain or promote urban agriculture, and develop a model to estimate GHG emissions from urban agriculture.

Isaac says there may be other benefits, too.

She points to the added security of having to rely less on food imports – not to mention the additional emissions created by the need to ship it around the world.

“The majority of our food is imported, so there’s a huge security element,” says Isaac, who is an expert on making agriculture more sustainable.

Postdoctoral researcher Lutchmee Sujeeun at the Black Creek Community Farm (submitted photo)

“This really came to light during the pandemic. If we can do more to localize food production and enhance crop diversity, it can help make our food system more resilient.”

The researchers also want to explore how sustainable agricultural practices – those that require less intensive use of fertilizers, pesticides and irrigation – in urban areas can help reduce GHG emissions compared to conventional agricultural systems. Isaac adds that greater urban food production might also help reduce the pressure on converting forests to farmland in rural areas, a major environmental concern and contributor to climate change.

The project brings together an interdisciplinary team of 15 researchers, including 11 from U of T, with expertise in soil biogeochemistry, crop biology, microbial ecology and urban food systems, among others. It also includes eight partner organizations from the private and public sectors that are involved in food production, food distribution and land management.

Adam Martin, an assistant professor in U of T Scarborough’s department of physical and environmental sciences and project co-lead, says urban farming isn’t about replacing large-scale agricultural systems that supply wheat, for example. Rather, he says it can produce relatively large quantities of fruits and vegetables that can bring economic benefits to urban households.

Martin adds that improving access to food in urban areas has a host of positive downstream effects.

“Local food banks rely heavily on local small-scale farms and community gardens for fresh produce, and food bank use is on the rise,” he says, noting that many urban communities are located in so-called “food deserts,” where the cost of accessing certain food, particularly fresh produce, is much higher than in other communities.

“By increasing people’s access to nutritious and affordable food, it can go a long way in addressing these social and economic challenges.”

U of T engineering students encouraged to consider sustainability when designing future AI systems

Christopher.Sorensen — Mon, 16 Sep 2024 15:10:13 +0000

U of T engineering students encouraged to consider sustainability when designing future AI systems

Christopher.Sorensen Mon, 09/16/2024 - 11:10

Cutline

Professors Hans-Arno Jacobsen, left, and Natalie Enright Jerger of the Faculty of Applied Science & Engineering are part of a team that is training computer system designers to integrate sustainability practices into the development of AI and machine learning systems (photo by Jenny Lee)

Matthew Tierney

Topic

Computer & Electrical Engineering

NSERC

Entrepreneurship Hatchery

Subheadline

The Sustainable Data Systems for Data Science initiative aims to align Canada’s tech investments with its vision for a carbon-neutral future

The growing global adoption of artificial intelligence technologies, including machine learning, has created a new sustainability challenge: AI systems are energy-intensive – and the more sophisticated they become, the more resources they require.

To help address the issue, a team of experts including the ��߲ݴ�ý’s Hans-Arno Jacobsen and Natalie Enright Jerger – both professors in the Edward S. Rogers Sr. department of electrical and computer engineering at the Faculty of Applied Science & Engineering – are launching an initiative that aims to align Canada’s tech investments with its vision for a sustainable, carbon-neutral future.

The Sustainable Data Systems for Data Science (SDSDS) project aims to train a new generation of computer and data scientists who can combine comprehensive technical skills with sustainability awareness. The project recently received a $1.6-million Collaborative Research and Training Experience (CREATE) grant from the Natural Science and Engineering Research Council of Canada (NSERC).

“A majority of students are unaware of how sustainability informs responsible development of platforms and systems because, frankly, there just aren’t many courses or learning paths available to them in this area,” says Enright Jerger, who holds the Canada Research Chair in Computer Architecture and is director of the division of engineering science.

“Another crucial component of this project is to equip our students with knowledge transfer strategies so they can seed these ideas in the workforce. Today’s trainees becoming tomorrow’s trainers.”

The SDSDS team propose training future computer systems designers to adopt a green approach when developing data analytics platforms and systems. The approach would apply to all aspects of the life cycle of development and deployment – such as hardware infrastructure, software systems and application domains.

To advance knowledge and dialogue on the issue, SDSDS will look to hold cross-university seminars on sustainability challenges and will offer courses on sustainable data science, along with summer school programs focused on energy-efficient software and hardware platforms.

The researchers also aim to connect students with industry via internships and applied research projects, enabling them to gain exposure to current challenges and facilitate cross-pollination of knowledge between industry and academia.

“The awareness about AI’s environmental impact is growing, but there is an expertise gap on how to address this very real problem – not just after the fact, but at inception. SDSDS aims to bridge this gap and prepare for the future resource demands of AI-driven industries,” says Bettina Kemme, professor of computer science at McGill University and team lead at SDSDS, which also includes Semih Salihoğlu of the University of Waterloo, Oana Balmau of McGill University and Essam Mansour of Concordia University.

“The potential of AI and machine learning systems are seemingly limitless,” says Jacobsen, who is the Jeffrey Skoll Chair in Computer Networks and Innovation. “Yet the true genius lies in building machine learning systems founded on sustainability principles. That’s real innovation.”

3D-printed soil? U of T startup expands sustainable urban farming footprint in Toronto

Christopher.Sorensen — Wed, 11 Sep 2024 15:07:18 +0000

3D-printed soil? U of T startup expands sustainable urban farming footprint in Toronto

Christopher.Sorensen Wed, 09/11/2024 - 11:07

Cutline

Leo Hua and Adnan Sharif show off fresh basil that was grown with Lyrata’s sustainable farming system at Toronto’s Casa Loma (photo by Liz Intac)

Topic

Innovation & Entrepreneurship

Startups

U of T Scarborough

Subheadline

With new installations at Casa Loma and U of T Scarborough, Lyrata is supplying freshly grown produce to local caterers and restaurants

A startup co-founded by a ��߲ݴ�ý graduate student has its roots in an experience that is all too common for many of us.

He kept forgetting to water his plants.

“I was working in a plant immunity biology lab, so if I didn’t water them, I’d have no plants to do experiments with,” says Adnan Sharif, who is pursuing a master’s degree in the department of chemical engineering and applied chemistry in the Faculty of Applied Science & Engineering.

He says his solution was inspired by his father.

“My dad is a mechanical engineering professor at a university in Japan, and he knows a lot about manufacturing materials with porous, three-dimensional structures,” he says. “That’s how I got the idea to make my own 3D-printed soil construct, which could retain water for a week or more.

“That way, I wouldn’t have to go into the lab and water the plants so often.”

The innovation – which Sharif came up as an undergraduate working in the lab of Keiko Yoshioka, a professor in the department of cell and systems biology in U of T’s Faculty of Arts & Science – is one of several that now underpins Lyrata, a startup that grows fresh produce for caterers and high-end restaurants across the Greater Toronto Area.

The company, which got its start in a greenhouse on U of T’s St. George campus, has recently expanded with operations at U of T Scarborough and Casa Loma, a museum, event space and historic site in midtown Toronto.

Growing plants without soil, known as hydroponics, is a technique commonly used in greenhouses worldwide. But Sharif and his team see an opportunity to make the industry more sustainable, starting with the soil replacement that the plants grow in.

“The product that almost everyone uses today is basically the same as house insulation,” Sharif says. “It’s made from rocks that are mined in remote places and shipped hundreds of kilometres to a production facility, where they are heated to thousands of degrees in a giant furnace to make a porous, chemically inert material. This material then needs to be shipped again to where it’s needed, and when you’re finished, you throw it in the garbage.”

By contrast, Lyrata’s SmartSoil is 3D-printed using biopolymers such as polylactic acid, which is derived from corn. These materials can be locally sourced and require much lower temperatures to melt and form into porous structures.

When the growing cycle is complete, the product goes through a low-heat proprietary cleaning process and can be used again. Sharif says that SmartSoil has a total lifespan of about two years, after which it can be composted along with crop residue. Together, these changes greatly lower the carbon footprint of indoor farming.

In 2020, Sharif and his co-founders brought his idea to The Entrepreneurship Hatchery, U of T Engineering’s startup incubator and one of several entrepreneurship hubs across U of T’s three campuses. Through the Hatchery’s Nest process, they were connected with business mentors, including alumnus Xavier Tang, a consultant and venture capitalist who still advises the company today.

Over the next few years, the team evolved, with some original members leaving and others joining. They include Leo Hua, who has been pivotal to speeding the development of 3D printable soil. The concept evolved, too, as the team realized that producing food was a better business for Lyrata than rather than selling their growth medium to other farmers.

The Hatchery team – in particular, Executive Director Joseph Orozco, Go-To-Market Lead Erika J. Murray and a team of work-study students, mentors and legal externs – helped Lyrata develop their technology and business. In 2022, the Hatchery provided $155,000 in seed funding, enabling the founders to be employed by their company and further supporting business development. The funding also enabled the company to rent greenhouse space on campus, where they began growing lettuce to provide to Spaces and Experiences at U of T.

Lyrata also developed something new: a modular unit that works exclusively with their SmartSoil and contains everything required to produce a variety of indoor crops – from lights and growth medium to irrigation systems.

“None of these technological and business developments would have taken place without the generous support of the over 50 Hatchery mentors, work-study students, and legal externs who contributed to our success,” says Sharif.

“Our current concept is what we call farming-as-a-service,” Hua adds. “The SmartGrow unit we developed is small enough to fit into a standard parking spot. Our clients sign a contract with us to place a unit on their site and we take care of everything from planting to harvesting.

“For a flat fee, they get a self-contained farm that provides a reliable quantity of their desired crop over a set period of time.”

In addition to providing a locally sourced, sustainable product, Sharif says the approach can also help mitigate fluctuations in the price of wholesale produce.

“In Canada, most of our lettuce comes from California, which has been dealing with drought and many other issues,” says Sharif. “Supply chain disruptions due to COVID-19 were also a big challenge for restaurants, which have very thin margins to begin with. At one point, the price of lettuce increased by a factor of six, so you can imagine the effect that would have.”

So far, Lyrata has produced more than 15 different types of crops, including basil, parsley and mizuna, also known as Japanese mustard greens.

Support from the U of T Engineering community has been key to Lyrata’s success.

For example, it was a U of T Engineering alumni connection that recently led to Lyrata launching an installation at the historic Casa Loma museum and landmark in Toronto.

“Lyrata’s competitive edge is that they provide an on-site, full service and they do not take up very much space,” says Nikol Watlikiewicz, Casa Loma’s horticulture and grounds manager. “In a small corner of our potting shed, we were able to build two grow units that provide a good yield weekly, without having to train our staff on the complicated system.

“Growing indoors gives us the stability and control that traditional agriculture does not. It’s an excellent example of how engineers can help solve the global food crisis with innovative thinking.”

In August, Lyrata launched another growing unit at U of T Scarborough, located within the Harmony Commons Dining Hall.

The priority for the next few years is growing Lyrata’s crop offerings and client base with ongoing support from The Hatchery. The incubator has facilitated graduate student placements through Mitacs, with matching funds. It also backed a recent $167,500 project with the Ontario and Canadian governments through the Sustainable Canadian Agricultural Partnership program to further advance the yield and efficiency of the SmartSoil system.

“The fact we’ve been able to come this far in such a short time is in large part due to the help we’ve had from U of T Engineering, and especially the Entrepreneurship Hatchery,” says Sharif.

“Whether it was getting seed funding, finding mentors, hiring work-study students or making important connections through their alumni network, we wouldn’t be here without their support.”

'Helping the people I grew up with': U of T undergrad returns home with a passion for sustainability

Christopher.Sorensen — Thu, 05 Sep 2024 15:56:08 +0000

'Helping the people I grew up with': U of T undergrad returns home with a passion for sustainability

Christopher.Sorensen Thu, 09/05/2024 - 11:56

Cutline

Connor Isaac, a third-year mechanical engineering student, says he hopes to bring awareness of new, sustainable technologies to the community where he grew up (photo by Tristan McGuirk)

Tristan McGuirk

Topic

Mechanical & Industrial Engineering