By Giacomo Panico, CBC News Ottawa, July 26, 2018
Ecology Ottawa is calling on the city to catch up with Montreal, Toronto, Chicago and other North American jurisdictions by passing a bylaw to force building developers to include roofs with gardens and greenery when possible, and encourage the green retrofit of existing roofs.
"We can imagine a city that's much cooler, much greener, with water that's entering our creeks and streams that's much cleaner," said Robb Barnes, executive director of Ecology Ottawa.
The city currently lacks the authority from the province to pass a bylaw that would require builders to make a percentage of their roofs green.
http://www.cbc.ca/news/canada/ottawa/green-roofs-developers-ottawa-1.4762756