Rice fields produce an important green house gas. Name it.

Explanation

**Step-by-Step Solution:**

1. **Identify the Context**: The question asks about a greenhouse gas produced in rice fields. Understanding the context of rice cultivation and its environmental impact is essential.

2. **Define Greenhouse Gases**: Greenhouse gases are gases that trap heat in the atmosphere, contributing to the greenhouse effect and global warming. Common examples include carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O).

3. **Focus on Rice Fields**: Rice fields are often flooded with water, creating anaerobic (low oxygen) conditions. This environment is conducive to certain types of bacteria.

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