[idontknowtech]

If you want to get really scared about methane leaks, sinkholes are forming across the tundra as global warming melts the permafrost, creating gigantic methane bubbles as the previously frozen organic material now rots. Those bubbles explode once big enough, creating massive pockmarks which fill in with water.

The amount of methane they leak is estimated to be gigantic, but without full coverage we'll never know.