The creation of methane from the break down of organic matter in an anaerobic digester

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Multiple Choice

The creation of methane from the break down of organic matter in an anaerobic digester

Explanation:
Anaerobic digestion of organic matter produces biogas, a methane-rich fuel. In an anaerobic digester, bacteria break down waste without oxygen, releasing a gas that is mainly methane with some carbon dioxide. That gas is called biogas and is commonly used for energy. The other options don’t fit: basalt is a rock; a basic volcano isn’t a gas produced by decomposition; and biomagnification describes how pollutants become more concentrated up food chains, not a gas produced in digestion.

Anaerobic digestion of organic matter produces biogas, a methane-rich fuel. In an anaerobic digester, bacteria break down waste without oxygen, releasing a gas that is mainly methane with some carbon dioxide. That gas is called biogas and is commonly used for energy. The other options don’t fit: basalt is a rock; a basic volcano isn’t a gas produced by decomposition; and biomagnification describes how pollutants become more concentrated up food chains, not a gas produced in digestion.

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