Acid rain from atmospheric pollution can reduce methane emissions from rice paddies. This is potentially a beneficial side effect of the high pollution levels China the world’s largest producer of rice is often associated with. Methane is 21 times more powerful as a greenhouse gas than carbon dioxide. The reduction in pollution happens during a stage of the life cycle when the rice plant is producing grain. This period is normally associated with around half of all methane emissions from rice and simulated acid rain pollution reduced this emission by 24 per cent. When the rice plant is producing grain, the carbohydrates are directed into grain production and away from soil so limiting the amount of food available for micro-organisms.