Methane content of biogas is

Options

A. 0.4
B. 20-3
C. 50-70%
D. 10-20%

Answer

To determine the methane content of biogas, we can follow these steps:

1. **Understanding Biogas Composition**: Biogas is primarily composed of several gases, with methane being the most significant component. Other components include carbon dioxide, hydrogen, and hydrogen sulfide.

2. **Identifying the Main Component**: Methane is the main component of biogas, and its percentage is essential to know.

3. **Analyzing the Options**: The options provided are:
- 0.4%
- 20 to 30%
- 50 to 70%
- 10 to 20%

4. **Referencing Known Data**: Based on scientific data, the methane content in biogas typically ranges from 50% to 70%. This is a well-established fact in the study of biogas composition.

5. **Selecting the Correct Answer**: Given the options and the known data about biogas composition, the correct answer is **50 to 70%**.

Thus, the methane content of biogas is **50 to 70%**.