How to change US housing to hit Paris Agreement goals

Los Angeles is already on track for the Paris 2050 goals, in part because energy demand is low there (fewer heating and cooling days) and because of California’s efforts to decarbonize its grid. Boston, by contrast, has to do all of the above: extensive retrofits, decarbonize its grid, install lots of heat pumps, and have solar panels on 40 percent of its homes. Even then, the communities within the Boston area that were projected to meet the goal were significantly more dense than they are at present.