Methane in the atmosphere is surging, and that's got scientists worried - Los Angeles Times

Scientists love a good mystery. But it’s more fun when the future of humanity isn’t at stake. This enigma involves methane, a potent greenhouse gas. Twenty years ago, the level of methane in the atmosphere stopped increasing, giving humanity a bit of a break when it came to slowing climate change. But the concentration started rising again in 2007 — and it’s been picking up the pace over the last four years, according to new research.