There is no secret to this selection. We asked Canada’s foremost environmentalists: Which PM accomplished the most on the environment front? It turns out Mulroney’s government got things done on acid rain and the Montreal Protocol. All Canadians benefit from those achievements. Here is the link to our extended article on the topic.

“I decided to assemble a jury of prominent Canadian environmentalists that represent the national organizations, and asked them which prime minister did the most for the environment,” Corporate Knight’s Editor Toby Heaps said in an interview.

“The replies started rolling in and I almost fell off my chair, because I started seeing Brian Mulroney’s name coming up again and again.”