Final answer:
Actions leading to an increase in carbon dioxide levels in the atmosphere are burning of fossil fuels and deforestation.
Explanation:
Increasing carbon dioxide levels in the atmosphere can be attributed to specific actions:
- Burning of fossil fuels: Combustion of coal, oil, and natural gas releases carbon dioxide into the air.
- Deforestation: Trees absorb carbon dioxide, so cutting them down reduces the planet's capacity to remove CO2 from the atmosphere.
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