The second important gas that causes greenhouse effect is methane. It is colorless, odorless gas used for domestic as well as industrial purpose. Methane is produced naturally by animals like cow, camels, and goats. It is produces near the water resources in large amount and when there is little amount of air. The main important sources of methane are
2. Rice paddies
Rice paddy fields produces huge amount of methane. Methane traps 20 times than that of carbon dioxide.