Clean Energy Fuels Corp. has signed a fuel supply agreement to provide renewable natural gas (RNG) to the nation’s largest public transit bus fleet at the Los Angeles County Metropolitan Transportation Authority (LA Metro).

The Newport Beach, CA-based operator agreed to provide an estimated 47.5 million gallons of RNG for the 2,400-bus fleet as part of a contract that runs through 3Q2022.

LA Metro’s chief sustainability officer Cris Liban said the transit operator’s use of RNG, in combination with ultra low-nitrogen oxide (NOx) engines, would help it become a net zero-emissions agency by 2050.

The supplies are to come from a nationwide network of RNG suppliers. More recently, Clean Energy opened a fueling station in Whittier, CA, for the Los Angeles County Sanitation...