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The smokestack of a ship might help us deal with spiking levels of methane. By Bill McKibben I’ve long felt that one of my great failings as a climate communicator has come in trying to get across the dangers posed by methane, the second most damaging greenhouse gas, after carbon dioxide. Despite long years of many people trying to underscore the risks of methane, our go-to shorthand for climate pollution remains “carbon.” That’s why companies and political leaders boast about how much they’ve reduced their carbon emissions, but, if they managed the trick by substituting gas for coal, their total contribution to global...