Name the possible sources of energy for chemogeny

Explanation

### Step-by-Step Solution:

1. **Understanding Chemogeny**:
- Chemogeny, also known as chemical evolution or the chemosynthetic theory, refers to the process through which organic substances are formed from inorganic compounds through chemical reactions.

2. **Identifying the Sources of Energy**:
- The energy required for chemogeny comes from various natural sources that facilitate chemical reactions leading to the formation of organic compounds.

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