How much have fossil fuel giants contributed to heat waves such as B.C.'s heat dome?

Planet-warming emissions from a group of the world's largest fossil fuel producers have significantly ramped up the intensity of heat waves, a new study suggests, one of the first peer-reviewed papers to links dozens of climate-fuelled weather events to specific companies.

The study led by a group of Swiss-based climate scientists says about one-quarter of the 213 recent heat waves they studied, including the 2021 B.C. heat dome, would have been virtually impossible without human-caused climate change.

It says emissions from some individual companies, including relatively smaller ones and some of Canada's oil and gas producers, would have been enough to make otherwise impossible heat waves statistically possible.

"These results are relevant not only in the scientific community but also