Carbon dioxide is the greenhouse gas that tends to get the most press when it comes to contributing to Anthropogenic Global Warming. But it isn’t the only one. Methane gas is actually a much stronger greenhouse gas but it doesn’t remain in the atmosphere nearly as long as CO2. However, a pair of studies would seem to provide two pieces of bad news concerning methane. If they are confirmed by further research it would indicate that methane emissions in the U.S. are much higher than previously thought and that the amount of methane that is being released from the East Siberian Arctic Shelf is also higher than previously believed. The emissions in the U.S. could be as much as 50% greater than previously believed and the methane from the shallow underwater platform in Siberia could be twice as great. If the methane being released by areas like the Siberian Arctic Shelf and other arctic areas where melting permafrost could release methane continue to increase then it could be a massive increase that would make current forecasting models incredibly conservative in their estimates of warming, especially since additional significant ocean warming could release additional methane from frozen deposits under the ocean.