Jun. 9, 2017

Toronto Mayor John Tory chats with Chicago Mayor Rahm Emanuel during a stop in Millennium Park on his visit to the Windy City this week - BROOKE COLLINS / OFFICE OF THE MAYOR OF CHICAGO

May. 8, 2017

A plan to reduce Toronto's greenhouse gas emissions will mean creating neighbourhoods where more people bike, walk and take transit - RANDY RISLING / TORONTO STAR

Dec. 29, 2016

Governments across Europe have aggressively promoted diesel in vehicles, reasoning that a lower carbon-dioxide output makes it gentler on the planet than gasoline - (Toby Melville / Reuters)