The E-Tracer #79, a 205.3MPGe battery electric tandem vehicle and X Prize winner, is seen on Capitol Hill in Washington on September 16, 2010. The vehicle is one of the three winners of the X Prize, which is awarded to teams who create new vehicles that inspire a new generation of viable, safe and super fuel-efficient vehicles that can achieve over 100 miles per gallon. UPI/Kevin Dietsch | License Photo

The Wave II, a 187 MPGe electric car made by Li-ion Motors Corp is seen on Capitol Hill in Washington on September 16, 2010. The vehicle is one of the three winners of the X Prize, which is awarded to teams who create new vehicles that inspire a new generation of viable, safe and super fuel-efficient vehicles that can achieve over 100 miles per gallon. UPI/Kevin Dietsch | License Photo

Guests look over entries before an awards ceremony for the winners of the Automotive X PRIZE in Washington on September 16, 2010. Three winners in different categories won for "the ability to achieve 100 miles per gallon or the energy equivalent (MPGe) and to survive grueling real-world safety, efficiency, emissions, durability and range tests." UPI/Roger L. Wollenberg | License Photo

The three winners are seen during an awards ceremony for the winners of the Automotive X PRIZE in Washington on September 16, 2010. Three winners in different categories won for "the ability to achieve 100 miles per gallon or the energy equivalent (MPGe) and to survive grueling real-world safety, efficiency, emissions, durability and range tests." UPI/Roger L. Wollenberg | License Photo

Guests look over entries before an awards ceremony for the winners of the Automotive X PRIZE in Washington on September 16, 2010. Three winners in different categories won for "the ability to achieve 100 miles per gallon or the energy equivalent (MPGe) and to survive grueling real-world safety, efficiency, emissions, durability and range tests." UPI/Roger L. Wollenberg | License Photo

House Select Energy Independence and Global Warming Chairman Edward Markey (D-MA) talks to Roger Riedener as he sits in the driver seat of his E-Tracer #79, a 205.3MPGe battery electric tandem vehicle and X Prize winner, on Capitol Hill in Washington on September 16, 2010. The vehicle is one of the three winners of the X Prize, which is awarded to teams who create new vehicles that inspire a new generation of viable, safe and super fuel-efficient vehicles that can achieve over 100 miles per gallon. UPI/Kevin Dietsch | License Photo

House Select Energy Independence and Global Warming Chairman Edward Markey (D-MA) gets out of the Wave II, a 187 MPGe electric car made by Li-ion Motors Corp. on Capitol Hill in Washington on September 16, 2010. The vehicle is one of the three winners of the X Prize, which is awarded to teams who create new vehicles that inspire a new generation of viable, safe and super fuel-efficient vehicles that can achieve over 100 miles per gallon. UPI/Kevin Dietsch | License Photo

House Select Energy Independence and Global Warming Chairman Edward Markey (D-MA) sits in the drivers seat of the Wave II, a 187MPGe electric car made by Li-ion Motors Corp. on Capitol Hill in Washington on September 16, 2010. The vehicle is one of the three winners of the X Prize, which is awarded to teams who create new vehicles that inspire a new generation of viable, safe and super fuel-efficient vehicles that can achieve over 100 miles per gallon. UPI/Kevin Dietsch | License Photo

House Select Energy Independence and Global Warming Chairman Edward Markey (D-MA) gets out of the Very Light Car #98 by Edison2, a 102.5 MPGe E85 powered car and X Prize winner, on Capitol Hill in Washington on September 16, 2010. The vehicle is one of the three winners of the X Prize, which is awarded to teams who create new vehicles that inspire a new generation of viable, safe and super fuel-efficient vehicles that can achieve over 100 miles per gallon. UPI/Kevin Dietsch | License Photo

House Select Energy Independence and Global Warming Chairman Edward Markey (D-MA) talks to Roger Riedener as he sits in the driver seat of his E-Tracer #79, a 205.3MPGe battery electric tandem vehicle and X Prize winner, on Capitol Hill in Washington on September 16, 2010. The vehicle is one of the three winners of the X Prize, which is awarded to teams who create new vehicles that inspire a new generation of viable, safe and super fuel-efficient vehicles that can achieve over 100 miles per gallon. UPI/Kevin Dietsch | License Photo

Speaker of the House Nancy Pelosi, D-CA, speaks during an awards ceremony for the winners of the Automotive X PRIZE in Washington on September 16, 2010. Three winners in different categories won for "the ability to achieve 100 miles per gallon or the energy equivalent (MPGe) and to survive grueling real-world safety, efficiency, emissions, durability and range tests." UPI/Roger L. Wollenberg | License Photo

DC Council member Marion Berry attends the awards ceremony for the winners of the Automotive X PRIZE in Washington on September 16, 2010. Three winners in different categories won for "the ability to achieve 100 miles per gallon or the energy equivalent (MPGe) and to survive grueling real-world safety, efficiency, emissions, durability and range tests." UPI/Roger L. Wollenberg | License Photo

Guests look over entries before an awards ceremony for the winners of the Automotive X PRIZE in Washington on September 16, 2010. Three winners in different categories won for "the ability to achieve 100 miles per gallon or the energy equivalent (MPGe) and to survive grueling real-world safety, efficiency, emissions, durability and range tests." UPI/Roger L. Wollenberg | License Photo

Guests look over entries before an awards ceremony for the winners of the Automotive X PRIZE in Washington on September 16, 2010. Three winners in different categories won for "the ability to achieve 100 miles per gallon or the energy equivalent (MPGe) and to survive grueling real-world safety, efficiency, emissions, durability and range tests." UPI/Roger L. Wollenberg | License Photo