Richard Newell is an economist with the RFF and in this podcast, with Scott Kirby, the CEO of United Airlines, he puts things in perspective: "Energy production and use is currently about 80 percent of all US greenhouse gases and 97 percent of carbon dioxide emissions." Kirby notes that the prospects are bright for sustainable fuels.
On a related note, the economics of electric cars are steadily improving. Even though the sticker price remains higher, the lifetime costs of ownership are lower for electrics.
