Which microbes are employed to produce biogas ?

Explanation

### Step-by-Step Solution:

1. **Understanding Biogas**:
- Biogas is a mixture of gases produced through microbial activity. It primarily consists of methane, carbon dioxide, and smaller amounts of other gases.

2. **Composition of Biogas**:
- The main components of biogas include:
- **Methane (CH₄)**: 50-70% (inflammable)
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