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How much nitrogen is in the earth's atmosphere?

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Although the earth's atmosphere is 78% nitrogen, free gaseous nitrogen cannot be utilized by animals or by higher plants.

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Get more facts and information about nitrogen cycle . Or, view the full encyclopedia entry from The Columbia Encyclopedia, Sixth Edition.

Similar questions: What makes up 78% of the earth's atmosphere? What percent of the earth's atmosphere is made of nitrogen? How much of the earth's atmosphere is composed of nitrogen? [ Hide these questions ]

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