I'm worried. Huge amounts of the powerful greenhouse gas methane are trapped in the Arctic's frozen ground. And the Arctic's ice is melting faster than anyone expected.
Scientists have estimated the cost of the damage that Arctic methane will cause if it leaks into the atmosphere. Their best answer? $60 trillion. That's the size of the whole world's economy in 2012. We'd better get serious about cutting our emissions fast.
This research appears in the 24 July issue of the journal Nature.