One unrelated correction - you mentioned passenger cars are responsible for 11.9% of global emissions, but your source says this figure is for the whole road transport. Passenger cars AFAIK account for the third of that.
Yes, good catch. I was getting that mixed up with the US EPA's stats[1]. FWIW they say passenger cars account for 58% of all transportation emissions within the US, more than all trucking, flights, and shipping combined. Again, within the US.
