By contrast, the powerful greenhouse gas methane is barely mentioned — perhaps because its main sources, while human - related, are «natural»: rice agriculture and cattle - raising. (thenewatlantis.com)
«Mysterious source of greenhouse gas methane in ocean explained.» (sciencedaily.com)
The United States has released an ambitious, climate - and conservation - focused agenda for its 2 - year chairmanship that includes pushing for more research on black carbon, which accelerates melting in the region, and on emissions of the potent greenhouse gas methane from the seabed and permafrost, as well as creating a network of marine protected areas in the Arctic and equipping Arctic villages with renewable energy sources. (science.sciencemag.org)