Agence France-Presse: The arctic tundra emits the same amount of methane in winter as in the warmer months, a surprising finding that bolsters understanding of how greenhouse gases interact with nature, researchers said on Wednesday. Scientists have long known that wetlands produce large amounts of methane and had thought it unlikely that greenhouse gases escaped from beneath frozen tundra. Mother Nature is showing us something that is really surprising. Nobody would expect to have loads of gas seeping out …