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What is significance of oxygen for sustaning life on earth (easy words)
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Oxygen is a vital part of our atmosphere that all living things need to survive. It makes up about 21% of the air we breathe and is essential for cellular respiration, the process that converts oxygen and nutrients into energy. Without oxygen, our cells would not be able to generate energy, and we would quickly die. Oxygen is also essential for many other life processes, such as breathing, digestion, and reproduction.
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