Rise in extreme wildfires linked directly to emissions from oil companies in new study

As fires blaze in Alberta, Saskatchewan and B.C., new research has drawn a direct and measurable link between carbon emissions traced back to the world's major fossil fuel producers and the increase in extreme wildfires across western Canada and the United States.

The peer-reviewed study, published last week in the journal Environmental Research Letters, found that 37 per cent of the total burned forest area in Western Canada and the United States between 1986-2021 can be traced back to 88 major fossil fuel producers and cement manufacturers.

"What we found is that the emissions from these companies have dramatically increased wildfire activity," said Carly Phillips, co-author on the study and a researcher at the Science Hub for Climate Litigation at the Union of Concerned Scientists.

Using modelling data, researchers were able to determine that emissions traced back to those 88 companies resulted in an additional 80,000 kilometres squared being burned. That's an area larger than the size of Ireland.

The Canadian Association of Petroleum Producers (CAPP) responded to the study in an email to CBC News. 

"While our view may differ from the group who produced the study, what we can agree on is the need for continued work towards driving down greenhouse gas emissions," said CAPP spokesperson Jay Averill.

"Canada's oil and natural gas industry is one of the largest investors in emissions reduction innovation in the country," Averill said, citing carbon capture and electrification programs. 

Canadian companies have a role to play in reducing global carbon emissions by exporting more natural gas to countries who are relying on coal to power their economies, Averill added. 

Jatan Buch, a research scientist at the Lamont-Doherty Earth Observatory at Columbia University, said in an email the research provides "strong evidence" of the impact of emissions traced back to specific fossil fuel companies.

Buch, who was not involved in the study, added that while research shows VPD is a leading driver in how far a wildfire spreads, other factors are also at play, including the precipitation and snowpack conditions early in the season, and the practices of prescribed burning and fire suppression.

The research is part of a growing field of study known as attribution science, which attempts to measure how climate change directly affected recent extreme weather events.

Jennifer Baltzer, an associate professor in the department of biology at Wilfrid Laurier University in Ontario, said it's becoming more common to see scientists make those connections.

"Last year, there were a number of studies that directly attributed the increase in emissions and associated climate warming with the massive heat waves that hit Europe," said Baltzer, the Canada Research Chair in Forests and Global Change.

"I think we're increasingly seeing scientists make stronger statements, which we need to be doing —- stronger statements about the fact that, yes, these changes in climate are human-caused and they are driving these massive catastrophes that we're seeing around the world."