A lot of Boulder homes are relatively small because they were built in the 40s-60s for a population with much more modest means. So it isn't rare to see millionaires living in a 1300 SQ ft ranch style home, and driving EVs or riding bakfiets style bikes around toting kids.

So, probably still more carbon intensive than city dwellers, but not necessarily as bad as other forms of suburban lifestyles, and that doesn't mean their efforts are for naught.