Wonway.....no doubt it would take a very long time to realize the goals of a Vinod Khosla.
But someone(s) have to take the intiative to get things started.
Bill Gates has a substantial investment in a company called Pacific Ethanol.
And the venture capitalists in Silicon Valley, like Khosla, see this kind of change as a solution to environmental and foreign stategic problems.....in addition to their hopes for revolutionizing the world in which we live....all while making some significant coin.