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30-05-2017
Biology

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Describe the organism that scientists believe was responsible for changing the composition of the early atmosphere. What was it called and how did it change did it change the atmosphere? Why was the change to the atmosphere so important?

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SourUmbrella SourUmbrella

08-06-2017

It was the plants around us. They give us air to breath. It was to help us breath so we can live.

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