[Herakles]

"Methane (CH4) is a principal component of natural gas."

Did you know that the "CLEAN" natural gas that has been fueling electric growth in the US since this country decided not to build Nuke plants, looses at minimum 4% of the quantity of fuel into the environment just due to leakage?

Clean, efficient natural gas!

[Kozak]

The major natural greenhouse gases are water vapor, which causes about 36-70% of the greenhouse effect on Earth (not including clouds); carbon dioxide, which causes 9-26%; methane, which causes 4-9%, and ozone, which causes 3-7%.