[subhero]

Commuting,as a neccessity, is also for the policy makers to fix imo, after they have put billions (trillions?) into road infrastructure. Channel it to public/mass transport if you are serious about decreasing carbon footprint of individuals in that aspect.

[Centigonal]

I agree with that. Plenty of European and East Asian cities have massive commuter load with a way smaller per-commuter energy footprint than in the USA.