How much methane is used in a year?
Methane is used in various ways Methane is important for electrical generation by burning it as a fuel in a gas turbine or steam boiler. Methane is used in industrial chemical processes and may be transported as a refrigerated liquid (liquefied natural gas, or LNG). for more informations, go to http://www.answers.com/topic/methane?cat=technology
Methane is neither "good" or "bad." "Good" and "bad" are human constructs. It is good to have methane in your compost heap, and bad to have too much methane in your house (KABOOM!) However, the Earth's ambient air always contains a certain amount of methane. Methane, by the way is a nontoxic odorless gas (contrary to common belief).