The recent gradual warming of the Earth's atmosphere since the 19th century onwards, largely believed to be the result of human activity.
Since 20th century Earth's surface temp has increased by 0.8 degrees C (Two thirds of change since 1980)
Recent rapid increase due to:
Increase in population-
- More car usage
- More energy needed so more fuels burnt
- Increase in development leading to more heat output
Increased gasses in the atmosphere-
- Less heat escaping the Earth (reflected back)
- Deforestation leading to more abundance of CO2
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