Explanation:

• Growing rice produces methane, a greenhouse gas more than 30 times as potent as carbon dioxide.
• Methane from rice fields contributes around 1.5 percent of total global greenhouse gas emissions and could grow substantially.
• Flooded rice fields emit methane (CH4), which is second in importance to CO2 as a greenhouse gas.
• A greenhouse gas is a gas that absorbs and emits radiant energy within the thermal infrared range, causing the greenhouse effect.
• The primary greenhouse gases in the earth’s atmosphere are water vapor, carbon dioxide, methane, nitrous oxide, and ozone.

Source: Shankar