Humans alter the nitrogen cycle by

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Humans alter the nitrogen cycle by manufacturing nitrogen compounds, such as fertilizers, to apply to agricultural fields. This excess nitrogen can run off into waterways, causing harmful algal blooms and other ecological problems. Disposing of human manure can actually help recycle nutrients, and the use of antibiotics only affects specific bacteria, not the entire nitrogen cycle. Overpopulation may indirectly affect the nitrogen cycle, but it is not a direct alteration.

Humans Alter the Nitrogen Cycle by