Methane+and+climate+change+2010

=
//**Methane is an odorless gas, a mixture containing about 75 percent, 15 percent ethane and 5 percent other hydrocarbons, like propane. Methane is also 21 times stronger then co2. Methane is emitted from both human-related and natural sources. Some human-related sources include fossil fuels,manure management, biomass burning, and waste management and natural sources include,** **wetlands, gas hydrates, permafrost, termites, oceans, freshwater bodies,** **anaerobic bacterial decomposition of plant and animal matter, some which occurs under water, produces marsh gas. Methane is a gas less dense than air. It melts at –183°C and boils at –164°C. It does not dissolve in water. Methane is a green house gas, and a high global warming potential. Methane acounts for about 16 percent of all green house gas Methane traps heat within the earths atmosphere. Methane has a half life of seven years. The earths crust contians methane in huge amounts. Other sources of methane include live stock and,**// **//volcanoes. //**======
 * //[]//**

//Methane in the World's Atmosphere: These maps show the distribution of methane at the surface (top) and in the stratosphere (lower), calculated by a NASA computer model. Concentrations are shown in parts per million by volume. Methane is created near the surface, and it is carried into the stratosphere by rising air in the tropics. (Credit: GMAO Chemical Forecasts and GEOS--CHEM NRT Simulations for ICARTT (top) and NASA GSFC Atmospheric Chemistry and Dynamics Branch (lower))// ([])

Sources: [], [], []