OAK FOREST, Ill. — Chicago School Transit recently began fueling its buses with a B20 blend of biodiesel fuel.

The move is part of the Illinois Clean School Bus Program, which was developed by Gov. Rod Blagojevich and the Illinois Environmental Protection Agency to reduce emissions.

Lt. Gov. Pat Quinn publicized the news on April 22 at an event held in conjunction with Earth Day.

“Thousands of Chicago students are breathing easier thanks to soy biodiesel in their school buses,” Quinn said. “I salute Chicago School Transit for reducing our children’s exposure to pollution.”

Officials said that Chicago School Transit is the first school bus operator in the Chicago metropolitan area to use the soy-based fuel. The B20 blend on which the buses are running is 20 percent biodiesel and 80 percent diesel.

Cook-Illinois Corp., parent of Chicago School Transit, said it plans to implement biodiesel use in 14 of its other community school bus fleets. The company operates 1,400 school buses in the Chicago area.