dik ... you have AC ?? your kids got you to give up driving, but you all kept the AC going. Any you cool to 68F ! ... boy, that's cool (mine is set for 22C).
I think it's laudable to use public transport ... at least one of the otherwise empty seats is being used. IMHO, outside of peak hour, public transport is very wasteful.
I do find your logic very "adaptable" ... kids get you to stop driving, but then you start again when you "need" to. You're so concerned that you stop driving, but keep the AC on ? Do you have solar cells ? maybe a heat pump ? (to save using the gird, and their Carbon cost) If you live in an area where you need AC (I'm guessing southern states, maybe Florida, but then I thought you were in Canada ??) why not move to where you don't need it ? where you can minimise your carbon footprint (to zero ? not reduce it for convenience).
"Hoffen wir mal, dass alles gut geht !"
General Paulus, Nov 1942, outside Stalingrad after the launch of Operation Uranus.