Global warming is the gradual increase in global temperatures caused by the emission of gases that trap the sun’s heat in the Earth’s atmosphere, which in turn causes changes in climate.What does cause it?
Scientists have determined that a number of human activities are contributing to global warming by adding excessive amounts of greenhouse gases to the atmosphere.
Human use of fossil fuels is the main source of excess greenhouse gases into the atmosphere. This is done by driving cars, using electricity from coal-fired power plants, or heating our homes with oil or natural gas.
Deforestation is another significant source of greenhouse gases, because fewer trees mean less carbon dioxide conversion to oxygen.
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