Question

3. What is global warming?​

Answer 1

Answer:

Global warming, the gradual heating of Earth's surface, oceans and atmosphere, is caused by human activity, primarily the burning of fossil fuels that pump carbon dioxide (CO2), methane and other greenhouse gases into the atmosphere.

Explanation:

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Answer 2

Answer:

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Global warming is the increase in the average measured temperature and it's projected persistence. Excess carbon dioxide in atmosphere is the main cause of global warming