Democrats and Republicans agree on virtually nothing at this point, except the desperate need to build more housing in the United States. Depending on your viewpoint, the country needs new domiciles because it puts people to work and stimulates local economies, or because it creates affordable homes and drives down housing costs , thus reducing homelessness. Affordability, including in housing, is now one of the biggest political issues in America. Neither party, though, is talking about the secret superpower of new apartment buildings: They’re much better for the planet than constructing single-family homes. According to a new report , these units are “an almost automatic form of building decarbonization ,” because three-quarters of new apartments are heated electrically.…