IMAGE DISTRIBUTED FOR FRITO-LAY - Representative from Trillium CNG shows the fueling of a CNG tractor on Wednesday, June 19, 2013 in Beloit, Wis. where Frito-Lay announced plans to introduce a total ... more 
IMAGE DISTRIBUTED FOR FRITO-LAY - Representative from Trillium CNG shows the fueling of a CNG tractor on Wednesday, June 19, 2013 in Beloit, Wis. where Frito-Lay announced plans to introduce a total of 208 CNG tractors onto routes by the end of 2013, eliminating 7,863 metric tons of carbon emissions annually.(Photo by Darren Hauck/Invision for Frito-Lay/AP Images) less 
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Associated Press
Wed, Jun 19, 2013 5:07 PM EDT