Nova has an interesting (and alarming) episode on melting permafrost in Siberia and Alaska that’s releasing methane–more warming–more melting and on it goes.
As the Arctic warms, methane that has been locked in permafrost for thousands of years escapes and can explode. Released methane that finds its way to the surface contributes to the greenhouse effect of climate change with even more heat retention capacity than carbon dioxide. Even igniting it doesn’t solve the problem, since that produces carbon dioxide as a byproduct.
It’s a tipping point, and it’s already tipped.
… Read the restIn Alaska they find a large lake bubbling with methane. On Siberia’s Yamal Peninsula, residents have reported large holes in the frozen tundra, including one more than
