* oxygen is so virtal for us
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Oxygen plays a critical role in respiration, the energy-producing chemistry that drives the metabolisms of most living things. We humans, along with many other creatures, need oxygen in the air we breathe to stay alive. Oxygen is generated during photosynthesis by plants and many types of microbes.
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Oxygen is important because it gives energy for our cells to work and not only the cells but also the cell organelles. ... we can't leave without oxygen but if we get pure form of O2 then also we will die.
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