Aside from water, concrete is the most-used material in the world, with about 14 billion cubic metres being used every year. Of that, 40% of that is used to build places for people to live.
Flooding in Montréal, and other Canadian cities, is becoming a more frequent occurrence.
As intense heat breaks records around the world, a little-reported fact offers some hope for cooling down cities: Under even the most intense periods of extreme heat, some city blocks never experience heat wave temperatures.
