Main Takeaways:
- What global warming does mean: global warming occurs when the average global temperature increases over long time periods of decades or more.
- What global warming does not mean: global warming is not a ‘uniform’ warming across every region on Earth – instead, for a given time period of overall warming, some places will be colder or warmer than the global average.
- The role of carbon dioxide (CO2) in global warming: Scientific evidence clearly shows that rising CO2 levels in Earth’s atmosphere have been the driving force behind recent global warming, trapping excess heat through the greenhouse effect.
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