Fifty-five heat waves in the last 25 years would have been nearly impossible without human-driven climate change, according to a recent study. This research, featured in the journal Nature, reviewed 213 heat waves from 2000 to 2023. It suggests that emissions from just 180 major fossil fuel and cement producers are primarily responsible for a significant rise in these extreme temperature events.
These companies contributed 57% of all carbon dioxide emissions from 1850 to 2023. “It’s surprising how few actors are behind such a large portion of emissions,” said Sonia Seneviratne, a climate professor at ETH Zurich and a contributor to the study.
The study utilized data from the EM-DAT International Disaster Database, which tracks global disaster events. It concluded that all 213 heat waves were made more likely due to global warming. Specifically, 55 of these events were 10,000 times more likely now than they would have been before the 1800s.
One significant example is the heat wave in Europe in 2022, which resulted in tens of thousands of deaths. Seneviratne highlighted its severe impact, noting how such heat waves can lead to both health crises and economic challenges.
Climate scientists use advanced computer models alongside historical weather data to connect extreme weather events with human emissions. Their work reveals not just single incidents but the broader impact of fossil fuel producers on climate change. Chris Callahan, a climate scientist at Indiana University, supports the study’s findings and emphasizes its importance in understanding accountability for climate change.
Lawsuits against fossil fuel companies are gathering momentum worldwide. States like Vermont and New York are already enacting laws to hold these companies accountable for their emissions. This emerging field of attribution science is crucial in identifying which companies may be responsible for climate-induced disasters.
Justin Mankin, a climate scientist at Dartmouth College, underscores the significance of understanding who is accountable for these changes. “We need to address who pays for the damage caused by climate change,” he said. As heat waves become more frequent, it’s crucial to identify the sources of emissions and the responsible parties.
For those interested in learning more, the full findings can be accessed at Nature (Nature).
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pollution, fossil fuels, climate change, global warming
