Emissions of methane from various sources of biomass burning are determined quantitatively for tropical, temperate, and boreal regions. About 85% of the total CH4 is emitted in the tropical area, which is mainly the result of shifting cultivation, fuelwood use, and deforestation. Methane emissions from biomass burning may have increased by a least 9% during the last decade because of increases in tropical deforestation and the use of fuelwood. Changes in land use practices and population growth in the tropics are possible causes of the increase of atmospheric CH4 concentration. ¿ American Geophysical Union 1993