Definitions for "CH4"
Methane. The second most common gas in the basket of six GHG s controlled by the Kyoto Protocol. Methane has a 100-year GWP of 21.
Methane. A colorless, nonpoisonous, flammable gas that is the primary component of natural gas. Methane has been identified as a “greenhouse” gas.
methane is a colorless, odourless gas, which is the most common hydrocarbon in the earth's atmosphere. It is of significance as a greenhouse gas responsible for global warming. About 20% of the total greenhouse effect is attributed to methane.