"Main culprit" is irrelevant, both because emissions are pretty well spread between numerous major activity/economic sectors. Even if it wasn't, we still wouldn

"Main culprit" is irrelevant, both because emissions are pretty well spread between numerous major activity/economic sectors. Even if it wasn't, we still wouldn't say "well shucks, X isn't the MAIN cause of Y, so we shouldn't do anything about it" https://www.epa.gov/ghgemissions/global-greenhouse-gas-emissions-data#Sector https://www.epa.gov/ghgemissions/global-greenhouse-gas-emiss... By the way, in the EU for example, passenger cars account for 60% of CO2 emissions related to transportation.