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Daniel Dickens

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Apr 29, 2013, 10:53:21 PM4/29/13
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what makes earth unique in the fact that it can sustain complex life?

LandonMoody

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Apr 29, 2013, 11:16:51 PM4/29/13
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It supplies everything that is needed to survive. Earth has a breathable atmosphere. Oxygen is the gas that is required for the life of most creatures. This is present in Earth's atmosphere and also in water. Oxygen is constantly put into the atmosphere by plants and trees. 
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