The co2 producer most lagging behind in terms of reduction is transportation. This is a field where endusers have giant impacts, and it will likely not be solve

The co2 producer most lagging behind in terms of reduction is transportation. This is a field where endusers have giant impacts, and it will likely not be solved by making those giant SUVs electric. This is also where the US is pretty bad, because of a culture that aspires to urban sprawl. More dense cities, more mixed use planning, more active transportation, less detached housing, less parking etc. are ways in which developed countries could really reduce their transportation carbon footprints (and incidentally also footprints related to AC/heating).