Easily overlooked small wetlands are a big source of global methane

Waterlogged land areas such as marshes, bogs and fens are the world's largest natural source of methane. Even the smallest of wetlands emit this powerful greenhouse gas. In a study from The University of Texas at Austin, researchers have identified tens of millions of easily overlooked small wetlands across the globe and found that they have a substantial collective impact, accounting for 24% of the world's total non-forested wetland emissions of methane. This research is published in Nature Climate Change.