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6 October, 02:10

What advantages are provided to developing rural areas by building and using an anaerobic digester?

Why does nitrogen have to be "fixed"? What organisms are responsible for nitrogen fixation?

The transformation and transport of substances though Earth's systems are known as biogeochemical cycles. What is included in these?

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  1. 6 October, 02:36
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    For question 2:

    Nitrogen-fixing bacteria convert atmospheric N2 to ammonium, a process called nitrogen fixation.
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