Whoever answers first, i will give you a Which of the following fuels is made in a bio digester?
1. hydrogen
2. oxygen
3. methane
4. carbon monoxide

methane

Explanation:

because this fuel is generated by the breakdown of organic matter by anaerobic bacteria and is used in energy production . It is a renewable energy source produced biologically through anaerobic digestion. It occurs naturally in compost heaps, as swamp gas, and as a result of enteric fermentation in cattle and other ruminants.  It is burned to generate heat or used in combustion engines to produce electricity.

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