There are a number of sources of atmospheric CH4, many of which are related to human activities, and might explain the increase in atmospheric CH4 Methane is emitted during the production and transport of coal,natural gas and oil.Methane emissions also result from the decomposition of organic wastes in municipal solid waste landfills and raising of livestock.
The CH4 increase might also possibly relate to the decreasing atmospheric levels of the hydroxyl radical (OH)
Author: Julia Allbutt (document modification date: 22th May 2003)