Step 19 of 66
Observed effects
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- Polar ice caps and glaciers are melting; Arctic sea ice has declined dramatically
- Sea levels have risen by about 21-24 centimeters since 1880 and are accelerating
- Extreme weather events (hurricanes, droughts, wildfires, floods) have become more frequent or severe
- Ocean acidification (from absorbed carbon dioxide) threatens marine ecosystems
- Coral reefs are dying
- Some agricultural regions are becoming less productive
- Vector-borne diseases are spreading to new regions as climate zones shift
- Refugees are increasingly fleeing climate-affected regions
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