Hm...

Most of USA pop. live in cites or towns[urban] own vehicles! Have a larger carbon footprint than a Chinese or Indian or any other Asian! most of pop in Asia live in villages are farmers/odd jobs, dont own vehicles for personal or for agriculture use! bottom line Americans over do it! A 14 trillion economy should invest in less polluting modes of transport like HSRL not just planes which use up so much of fuel! No high speed rail in USA. that's embarrassing! Europe has it! need to make change at home & fast!!!