Retrofitting Buildings Is the Unsexy Climate Fix the World Needs

You may not have noticed unless you live in London, but protesters have been gluing their hands to the asphalt of the city’s thundering eight-lane M25 ring road, to the weirdly technocratic war cry of “Insulate Britain!” Frustrated commuters and the police officers who’ve had to peel these sticky activists from the road find them irritating. Yet they have a point. Among top producers of climate-harming emissions that world leaders plan to address at COP26 in Glasgow in November, buildings are the summit’s largely ignored Cinderella.