A British supermarket chain said today that it would begin fueling its delivery trucks with chicken waste and used cooking oils. The Asda chain, which includes 258 stores in the U.K and is a part of the Wal-Mart company, generates about 36,500 gallons per year of chicken waste and cooking fat that currently winds up in landfills. But starting in April, the gunk will be transformed into biodiesel to power the company’s trucks. For fact-happy readers: According to Asda, the U.K. produces as much as 23 million gallons per year of used cooking oil.