This is because methane from clathrates and methane from peat are slightly different.

ECONOMIST: Methane and climate change

He thinks the liberation of methane stored at the bottom of the ocean in structures called clathrates is the most likely culprit.

ECONOMIST: A geological burp may have led to the dinosaurs�� domination

One, championed by James Kennett, a paleo-oceanographer from the University of California, Santa Barbara, is that it was indeed released from clathrates.

ECONOMIST: Methane and climate change

That will raise the sea level, increasing the pressure at the bottom and thus stabilising clathrates there in other words, there will be negative feedback.

ECONOMIST: Methane and climate change