CAPE CANAVERAL, Fla. –– A variety of alternative fuel vehicles are driven around NASA's Kennedy Space Center in Florida in an effort to reduce gasoline consumption and conserve energy. These include compressed natural gas, bi-fuel, diesel fuel and flex fuel vehicles. Here they are on display at the NASA News Center. In the background is the Vehicle Assembly Building. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. –– A variety of alternative fuel vehicles are driven around NASA's Kennedy Space Center in Florida in an effort to reduce gasoline consumption and conserve energy. These include compressed natural gas, bi-fuel, diesel fuel and flex fuel vehicles. Here they are on display at the NASA News Center. In the background is the Vehicle Assembly Building. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. –– On display at NASA's Kennedy Space Center in Florida is one of the variety of alternative fuel vehicles driven around the center in an effort to reduce gasoline consumption and conserve energy. This car is a LiV Dash, a lithium vehicle Smart Car that uses lithium batteries. The other vehicles include compressed natural gas, bi-fuel, diesel fuel and flex fuel vehicles. Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. –– A variety of alternative fuel vehicles are driven around NASA's Kennedy Space Center in Florida in an effort to reduce gasoline consumption and conserve energy. These include compressed natural gas, bi-fuel, diesel fuel and flex fuel vehicles. Here they are on display at the NASA News Center. In the background is the Vehicle Assembly Building. Photo credit: NASA/Jim Grossmann