Scientists have uncovered a powerful source of a leading greenhouse gas that is venting into the atmosphere at unprecedented rates. The permafrost beneath the East Siberian Arctic Shelf, a relatively shallow section of the Arctic Ocean, has been pumping 7.7 million tons of methane into the air each year -- roughly the amount released into the atmosphere by the rest of the world's oceans combined. But since scientists just discovered it, we don't know if it started last year, a century ago, or a million years ago. In short, just knowing it is there does not mean that anything different is going on from what has gone on, ever. They just know about it now.
No cause for panic, and certainly no ability to attribute any change which might occur in climate to it.
Maybe the 'marsh gas' would explain a few UFOs, though...
This appears to have been going on since time immemorial. Just like underground burning coal seams have been a fact since all of recorded history. Just because it has only recently been studied, media flunkies think it just started. And "scientists" will let them believe that too, as it means money in their pockets.