Methane On The Rise

Do not worry it breaks down in a year or so. It turns into CO2.

WASHINGTON (Reuters) - Levels of climate-warming methane -- a greenhouse gas 25 times as potent as carbon dioxide -- rose abruptly in Earth's atmosphere last year, and scientists who reported the change don't know why it occurred.

Methane, the primary component of natural gas, has more than doubled in the atmosphere since pre-industrial times, but stayed largely stable over the last decade or so before rising in 2007, researchers said on Wednesday.

This stability led scientists to believe that the emissions of methane, from natural sources like cows, sheep and wetlands, as well as from human activities like coal and gas production, were balanced by the destruction of methane in the atmosphere.

But that balance was upset starting early last year, releasing millions of metric tonnes more methane into the air, the scientists wrote in the Geophysical Research Letters.

The permafrost is melting. It has more methane than previously thought.