Did you know? A bicycle is a marvel of engineering efficiency, one where an investment in 22 pounds of metal and rubber boosts the efficiency of an individual mobility by a factor of three. On my bike I estimate that I get easily 7 miles per potato. For more information view the text and data in Chapter 6 of Plan B 4.0: Mobilizing to Save Civilization.
E-briefing of Lester Brown talk on Plan B: Rescuing a Planet Under Stress & a Civilization in Trouble at New York Academy of Sciences. [Note: http://www.nyas.org/ebriefreps/splash.asp?intebriefID=221 no longer exists.]