Jeffrey Barbee, for the Pulitzer Center
When I was in Copenhagen, I was watching the National Oceanic and Atmospheric Administration's (NOAA) science on a sphere at the US pavilion. I saw a video made by Alaskan researcher Katey Walter from the University of Alaska at Fairbanks. It shows methane bubbling out of a lake, and then how they returned there in the winter and lit the methane release on fire. They laugh in the video because they almost blew themselves up, but this is not a laughing matter.