By Mark Brownstein This is the Methane Moment. As policymakers prepare for the COP26 climate talks in Glasgow, data continues to show that the methane problem is worse than we thought. In August, the Intergovernmental Panel on Climate Change warned that we cannot reach the Paris climate goals by tackling only carbon dioxide. Cutting methane from fossil fuels, livestock production and other industries is the fastest way to slow today’s warming, even while we continue to decarbonize our energy systems. Fortunately, this urgency is finally being recognized at the highest levels in ways it hadn’t before, setting the stage for real progress. It’s worth considering how we reached this point. Unlike so much of the climate fight, decision makers mostly did listen to the science on methane.…