http://gristmill.grist.org/story/2006/2/12/153637/246#3

400 times http://www.eurekalert.org/pub_releases/2003-10/uou-bm9102603.php "Bad Mileage: 98 tons of plants per gallon" "Dukes also calculated that the amount of fossil fuel burned in a single year - 1997 was used in the study - totals 97 million billion pounds of carbon, which is equivalent to more than 400 times "all the plant matter that grows in the world in a year," including vast amounts of microscopic plant life in the oceans." Just doesn't seem sustainable somehow.   Some intersections can be dangerous!

5 times And wind resources are 5 times energy used worldwide. http://www.ocean.udel.edu/windpower/ResourceMap/index-world.html "Archer and Jacobson use worldwide weather stations (more accurate than the above GEOS-1 data, but not covering the oceans) and estimate the worldwide land and near-shore wind resource. Their calculation of total wind resource is 72 TW. This is seven tiems the world's electricity demand and five times the world eneregy demand (all commercial fuels and carriers)." This on the other hand would seem sustainable.