Coupled anaerobic methane oxidation and metal reduction in soil under elevated CO.

Continued current emissions of carbon dioxide (CO ) and methane (CH ) by human activities will increase global atmospheric CO and CH concentrations and surface temperature significantly. Fields of paddy rice, the most important form of anthropogenic wetlands, account for about 9% of anthropogenic sources of CH . Elevated atmospheric CO may enhance CH production in rice paddies, potentially reinforcing the increase in atmospheric CH .