Yonge Street is Canada’s business pedestrian thoroughfare. Some 180,000 Torontonians live within 10 minutes of the downtown stretch, stacked into the country’s tallest residential towers. There are thousands of people, including my own family, who don’t have backyards where they can stretch their legs or get exercise, who have to use narrow sidewalks to get groceries and run other critical errands. Many low-income renters live in older buildings without balconies, let alone a porch where they can get fresh air. This trend will continue: 94 per cent of new housing today is in buildings taller than five storeys.