Mongabay: Destruction of wetland ecosystems will generate massive greenhouse gas emissions in coming years, warn experts convening at an international wetlands conference in Brazil. While they cover only 6 percent of the world’s surface, wetlands – marshes, peat bogs, swamps, river deltas, mangroves, tundra, lagoons and river floodplains – are estimated to hold 771 gigatons of greenhouse gases , or 10-20 percent of the globe’s terrestrial carbon. Beyond carbon storage, wetlands provide a range …