What's the difference in carbon footprint of commuting by train, bus, car, plane, and subway?

Question

I'd like to know if any universities or environmental research groups are studying the specifics, so I can get statistics on various modes of transport.

Answer 1

ask al gore i understand his home use 20 times the nation average in electricity and he owns 7 suvs and his private jet burns more fuel than 100 cars every time he flys to accept a award for being green..  

Answer 2

http://en.wikipedia.org/wiki/Fuel_effici...

Look under modes of transportation.

(Carbon footprint is roughly proportional to energy consumption per passenger mile).

Answer 3

First of all, the 'carbon footprint' scam is just that, a scam designed to separate you from your money.

Secondly, even though the much larger engines used in public transport pollute more than the smaller units in personal transports, the large conveyances carry (when fully loaded) more people. Since the larger number of people is now _not_ operating individual cars, the net pollution is less.

For stats, you might try D.O.T. for starters.  Look at http://www.usa.gov/ for the portal to loads of federal gov't services and info.