The 2011 Green Flight Challenge sponsored by Google marks an historic achievement in aviation—the first demonstration of practical, cross-country emission-free flight.
CAFE Foundation Flight Test Center at Charles M. Schulz Sonoma County Airport in Santa Rosa, California. It is the largest-ever prize for civil aviation. Team aircraft must fly 200 miles in less than two hours using the energy equivalent of less than 1 gallon of gasoline per occupant. Team aircraft include those propelled by gasoline, bio-diesel, hydrogen, and electricity.