GreenFest 2013 celebrated Earth Day in April by showcasing a Green Vehicle & Tech Zone on the campus of the University of Nevada, Las Vegas. Green vehicles included cars with electric motors such as a Tesla Motors Model S, Ford C-Max hybrid, Ford Fusion Energi plug-in hybrid, Nissan Leaf and Chevrolet Volt. The exhibit also included vehicles powered by compressed natural gas, or CNG: a Honda Civic, a Chevrolet Silverado 2500 HD truck from Southwest Gas Corp., and a mechanized trash collection truck from Republic Services.