Barbara Buffaloe from Columbia, Missouri, saw the global event as a chance to show that, despite federal cuts, ‘our cities are working together on climate action.’By Christine SpolarLondon Climate Action Week opened in the British capital just as an unprecedented heat wave gripped the country and mainland Europe. Among the tens of thousands of attendees at the global event were elected leaders from U.S. cities who are pursuing on-the-ground policies to lower emissions and scale renewable energy.