Answers

2016-02-02T10:24:56+05:30
A nitrogen footprint is a measure of the amount of nitrogen released to the environment as a result of human activities.
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2016-02-02T13:19:36+05:30
A nitrogen footprint is a measure of the amount of nitrogen released to the environment as a result of human activities.
I didn't copied the previous answer but I saw this on internet.
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