Climate ‘feedback loops’ could worsen global warming by 30%, study finds
Summary
A new study finds that natural sources like thawing permafrost, wildfires, and warming wetlands are releasing methane and carbon dioxide, adding to human-caused climate change. These natural emissions could increase global warming by 20%-30% by the end of the century, which is currently not fully accounted for in climate models.Key Facts
- Rising global temperatures are causing forests, wetlands, and tundra to emit more greenhouse gases.
- Permafrost thaw, wildfires, and warmer lakes release methane and carbon dioxide trapped in nature.
- These emissions act as “feedback loops” that make global warming worse beyond human emissions.
- The study estimates that natural emissions will increase global heating by 0.2°C to 0.4°C by 2100.
- Current climate models and policies often ignore these additional natural emissions.
- The predicted increase will make it harder to meet global climate goals like limiting warming to 1.5°C.
- Researchers urge that climate plans include these natural feedbacks to better predict and reduce warming.
- The risk exists of passing “tipping points” that could cause uncontrollable climate changes if global heating continues.
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