Choice C, The global temperature is rising as a result of the greenhouse effect. This rise is mostly caused by the greenhouse gases CO2 and others that block the Earth's heat from escaping.
The way greenhouse gases trap heat close to the Earth's surface is known as the greenhouse effect. You might imagine these heat-trapping gases as a blanket covering the Earth, keeping it warmer than it would be otherwise.
Human activity has led to a rise in greenhouse gas concentrations. Carbon dioxide levels in the environment during the past century have dramatically grown as a result of burning fossil fuels like coal and oil. Burning coal or oil releases CO2 when airborne oxygen and carbon combine, causing this spike.
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