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 link 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. …The researchers linked emissions from the group of cement and fossil-fuel producers to about half the increase in heat wave intensity connected to human-caused climate change.