Four years ago, Canada became the first country to withdraw from the 1997 Kyoto Protocol that set global targets to reduce greenhouse gas emissions.
A lot has changed since then.
On Monday, less than a month after being sworn in as Canada's 23rd prime minister, Justin Trudeau leads a Canadian delegation to the United Nations climate change summit in Paris, eager to negotiate a new global agreement.
"Canada is back," said Canadian Environment and Climate Change Minister Catherine McKenna at a news conference Sunday in the French capital.
Well-known Canadian environmentalist, scientist and broadcaster David Suzuki, who joined thousands in Ottawa on Sunday...