A 2-mile-long methane plume in New Mexico. Credit: NASA / JPL-Caltech ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Anew instrument aboard the International Space Station (ISS) has been used to identify more than 50 “super-emitters” of methane — a major step toward slashing global warming. The challenge: To combat global warming, we need to cut our greenhouse gas emissions. Carbon dioxide accounts for the majority of those emissions, and transitioning from fossil fuels to clean energy will significantly reduce those. Methane is a much less common greenhouse gas than CO2, but it’s far more potent, with each ton emitted causing 80 times as much warming in...