Global warming is the result of burning fossil fuels. Which concept(s) describe(s) this statement?
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Answer:
Fossil fuels are the main source of energy in the world today. The word "fuels" means they are burned to create energy. Fossil fuels happen to be long-chain hydrocarbons (i.e. they are made up of hydrogen and carbon bonded together.) When the fuel is oxidized (i.e. oxygen added at high temperature), the bonds break and release a lot of energy. The energy does things like move our cars and generate electricity. Sometimes it's just the energy itself we want (as in heating our homes). When hydrocarbons get burned, the hydrogen atoms join with oxygen to form H2O, which is water, and the carbons join with oxygen to form CO2, which is carbon dioxide. Both the water and the carbon dioxide get released into the air.
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