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Artificial nitrate or ammonia fertilizers. These are usually applied to crop fields but runoff in rains into surrounding streams and rivers, thus entering the environment.

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8y ago
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6mo ago

Fertilizers are a human-made product that allows nitrogen to enter ecosystems. These products are used in agriculture to increase soil fertility and promote plant growth. However, excess use of fertilizers can lead to nitrogen runoff, which can cause water pollution and disrupt ecological balance.

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Q: What is a human made product that allows nitrogen to enter ecosystems?
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