Worldwide increase in methane bubbles due to climate change

Science Daily

Due to climate change, more and more methane is bubbling up from lakes, ponds, rivers and wetlands throughout the world. The release of methane -- a potent greenhouse gas -- leads to a further increase in temperature, thus creating a positive feedback loop (also known as a 'vicious circle'). Story here.

Methane bubbles from the La Brea Tar Pits - Los Angeles. 
Photo credit - KimonBerlin