Thirteen teams are competing to build a plane that can fly at least 100 miles per hour and achieve the equivalent energy efficiency of 200 miles per gallon of fuel on a 200-mile flight.

FORBES: Google Pushes Electric Planes In Green Flight Challenge

Facilities that achieve 60 percent efficiency will be eligible for a full REC per megawatt-hour.

FORBES: Massachusetts Addresses "Biomass Loophole" and Limits Subsidies

The 4-Hour Body, Ferriss' treatise on using tracking to lose weight, maximize efficiency and "become superhuman, " shot to the top of the New York Times bestseller list in January.

FORBES: Magazine Article