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What is global warming?

6 Answers
my new questions is : what is global warming?, thank u in advance
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Global warming is the increase in average temperature of the Earth. It has been going on for a while. ...
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Global warming is when the earth heats up (the temperature rises). It happens when greenhouse gases trap heat and light from the sun in the earth's atmosphere. ...
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Global warming is an overall increase in world temperatures which may be caused by additional heat being trapped by greenhouse gases. Its a real threat. ...
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Global warming is an overall increase in world temperatures which may be caused by additional heat being trapped by greenhouse gases. ...
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Global warming is the increase in average temperature of the Earth. It has been going on for a while! ...
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Global warming is an increase in the earth's average atmospheric temperature that changes in climate. ...