Insulation and soundproofing
Does plastic foam or Styrofoam insulation have a place in green building?
...blowing agents (spray foam is already transitioning to lower GHG blowing agents; read more here), then you solve a big part of the problem. If we capture and re-use the blowing agents, like pentane gas, even better. And if we create large-scale recycling of older foam insulation to make new foam insulation, then things...