Toronto has committed to ambitious greenhouse gas reduction targets, and meeting those targets requires addressing the transportation sector — one of the largest sources of emissions in the region. Electric vehicles will play a role in that transition, but electrification alone is not sufficient. The density, mix of uses, and walkability of communities determines how much driving is required in the first place — and this built environment dimension is one of the most powerful, and most durable, levers available to reduce transportation emissions.
A resident who lives in a walkable neighbourhood — where groceries, schools, parks, and transit are within comfortable walking or cycling distance — drives less than a resident in a car-dependent suburb, regardless of what vehicle each person owns. This difference in travel behaviour, multiplied across hundreds of thousands of households, has a substantial effect on regional emissions. It also means that land use policy — zoning, density, mixed use — is climate policy, even if it is rarely framed that way in public debate.
The Walkability–Emissions Link
Studies comparing greenhouse gas emissions by neighbourhood type consistently find that residents of walkable, transit-connected urban areas have significantly lower transportation emissions than residents of car-dependent suburbs. The effect is large enough to offset advantages in building energy efficiency and other factors — meaning that where you live, and how the neighbourhood around you is designed, has a greater effect on your transportation emissions than almost any individual consumption choice.
This does not mean that low-density suburbs must be eliminated — it means that new development, and the densification of existing areas, should prioritise walkability and transit access as core design criteria rather than afterthoughts. As Toronto grows, the form that growth takes will lock in travel patterns and emissions for decades. Getting the design right — mixing uses, building at densities that support transit and cycling, and ensuring pedestrian infrastructure is functional and pleasant — is a decision with a very long tail.
Missing Middle Housing and Complete Neighbourhoods
One of the barriers to walkability in Toronto's inner suburbs is the dominance of single-use zoning — large areas designated exclusively for detached housing, without the density or mixed uses that make walking to daily destinations practical. The concept of the "15-minute city" — where daily necessities are accessible within a 15-minute walk or bike ride — requires a mix of housing types, shops, services, and public space that traditional single-family zoning does not permit.
Toronto and many Ontario municipalities have taken steps toward more permissive housing policy, including changes to zoning rules that previously restricted density on residential streets. These changes, while incremental, open the door to the kind of gentle densification — adding secondary suites, laneway housing, small apartment buildings — that can make neighbourhoods more walkable over time without dramatically changing their character.
Urban Tree Cover and the Heat Island Effect
Walkability is not only about destinations — it is about the quality of the walking environment. Streets with mature tree canopy are measurably cooler in summer than those without, a difference that becomes increasingly significant as climate change raises urban temperatures. Toronto's urban forest is a critical piece of infrastructure: it reduces the urban heat island effect, makes walking more comfortable in warm weather, and contributes to the kind of pleasant street environment that encourages people to be outside rather than in air-conditioned cars.
Maintaining and expanding Toronto's tree canopy, particularly in areas that are currently underserved by street trees, is both a climate adaptation measure and an investment in walkability. The connection between tree planting and transportation emissions reduction is indirect but real — streets that are pleasant to walk are streets that people actually walk.
Planning Decisions That Last
The decisions Toronto makes now about where and how densely to build, how to design streets, and where to extend transit will shape the city's emissions profile for the next generation. Walkable communities do not happen by accident — they are the result of deliberate planning choices about land use, street design, and public investment. Making those choices well requires public engagement, long-term thinking, and a willingness to prioritise sustainability alongside economic and political pressures. That is what campaigns like Your32 advocate for: a city designed to support a lower-carbon, higher-quality way of life.
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