Burning coal and driving a car utilize fossil fuels which release a large amount of Carbon dioxide into the atmosphere. This is a greenhouse gas that traps heat in the atmosphere. So the correct option is C.
The way by which the gases the atmosphere are trapped in the atmosphere and are not allowed to escape is called the greenhouse effect. The gases which bring about the greenhouse effect are called greenhouse gases. They are a part of our atmosphere.
Examples of greenhouse gases include Carbon dioxide, methane, nitrous oxide etc. The burning of fossil fuels releases carbon dioxide. This increases the level of heat being trapped inside the earth's atmosphere. This increased heat causes global warming.
Therefore, the correct option is C
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