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What are the impacts of deforestation on the Earth's oxygen and carbon cycles? What are the other consequences of deforestation?
Burning of fuels like wood and coal adds carbon dioxide to the air and uses up oxygen.
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The figure shows how two gases, X and Y, move between the air, green plants and animals. During the day, green plants take in gas Y and give out gas X. Animals take in gas X and give out gas Y all the time.
