Philip Lee-Shanok, CBC News
Centralized heating and cooling has taken on new life developments like Regent Park.
Toronto is tapping into the city's hot real estate market to bring back an old concept to heat and cool buildings and homes downtown using new technology.
It's called "district energy" — using one energy source to power an entire neighbourhood or community.
Fernando Carou, manager of community energy initiatives at the City of Toronto, describes it as being similar to public transit, but for buildings and homes.