Alaska's new lakes are teeming with bacteria that release methane and threaten the planet.

Newly formed lakes are called thermokarst. The bacteria found in them were sealed in the ice for decades, and now they've been released and began to absorb organic matter and release methane into the air - this greenhouse gas contributes to the temperature increase on Earth. Some lakes produce such large amounts of methane that bubbles rising to the surface can be seen with the naked eye. So far, scientists continue to observe and try to assess how dangerous the current situation is for the environment.