Environment and Climate Change Canada is expanding upon a system it introduced in the summer to measure heatwaves. The tool will help officials with measuring the extent to which human-caused climate change affects individual cold snaps.

Sian Kou-Giesbrecht, an assistant professor at Dalhousie University, conducted a modelling study that estimates about 12,566 annual wildfire smoke-related deaths in the 2010s were linked to climate change, up from about 669 in the 1960s.

The case is the first in Canada to consider whether governments' approach to climate change has the potential to violate the Charter of Rights and Freedoms.

The Court of Appeal for Ontario heard arguments earlier this year brought by seven young people who say the province's weakened emissions target is a violation of their constitutional rights.

It's latest in a series of city-level moves across Canada, including in Ottawa and Montreal, to look at greenwashing, a term for ads that make misleading or false environmental claims.

Yves Giroux says today's report still finds the vast majority of households get back more in rebates than they pay through the carbon price — but once broader economic effects are factored in, those gains are wiped out for most, except for some lower-income earners.

Oil and gas production hikes and rebounding air travel put a drag on Canada's climate progress last year, but a new report says the country was still able to make a modest cut to its planet-warming emissions.

The study published Wednesday in the journal Nature says only China, India and the United States release more carbon per year than Canada's 2023 wildfires did from May to September.

Environment and Climate Change Canada says the results of its rapid analysis into the mid-June heat wave over parts of Ontario, Quebec and Atlantic Canada show it was made two to ten times more likely due to climate change. 

The heat wave that gripped Eastern Canada last week brought stifling conditions, put pressure on the electricity grid and broke several temperature records as residents sweltered.