It's already happened, methane has been bubbling from the arctic seabed since 2012. Noone that can do anything cares. https://www.nasa.gov/topics/earth/featur

It's already happened, methane has been bubbling from the arctic seabed since 2012. Noone that can do anything cares. https://www.nasa.gov/topics/earth/features/earth20120422.html https://www.nasa.gov/topics/earth/features/earth20120422.htm...