How does oxygen occur in nature explain oxygen cycle in nature
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The oxygen cycle elaborates how oxygen circulates in various forms through nature.Oxygen occurs freely in the air, trapped in the earth crust as chemical compounds, or dissolved in water. Oxygen in the atmosphere is about 21%, and it is the second most abundant gas after nitrogen
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by plants as
CO2+H2O.gives C6H12O6+O2 H20
CO2+H2O.gives C6H12O6+O2 H20
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