British Columbia in Canada, during the 2023 wildfire season
David J. Mitchell/Shutterstock
Extreme heat, drought and wildfires caused forests and other land ecosystems to emit almost as much carbon dioxide as they removed from the atmosphere in 2023, nearly canceling out a major natural sink of the greenhouse gas.
Researchers say the temporary decline of this sink – which usually removes about a quarter of our annual CO2 emissions from the atmosphere – bodes ill for how these ecosystems will respond to future climate change.
“It’s pretty grim,” says…
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