Clean Energy Breaks Ground On Three Renewable Natural Gas Dairy Projects With Maas Energy Works

Newport Beach, Calif. – September 16, 2025 – Clean Energy Fuels Corp. (NASDAQ: CLNE) has announced it has broken ground on three renewable natural gas (RNG) production facilities under its development agreement with Maas Energy Works. These projects span six dairies located in South Dakota, Georgia, Florida and New Mexico, and are expected to produce approximately three million gallons of RNG annually once fully operational.

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Capturing methane from a combined herd of 24,300 dairy cows, preventing harmful emissions from entering the atmosphere, the RNG produced will be used to power heavy-duty trucking, transit and vocational fleets nationwide – providing a reliable supply of negative-carbon fuel to Clean Energy’s network of over 600 stations.

"Partnering with an industry leader like Maas Energy Works on these projects will enable us to quickly bring meaningful volumes of ultraclean fuel to the transportation market," said Clay Corbus, senior vice president of renewables at Clean Energy. "We’re seeing rising demand for RNG from fleets looking to decarbonize, and breaking ground on these production facilities is a significant step forward in meeting that need."

Maas Energy Works brings a unique approach to RNG production through its covered lagoon system. Unlike traditional anaerobic digester tanks which are more costly to build and operate, Maas Energy’s method involves capturing methane from manure stored in large, tarp covered lagoon digesters. This technique offers a cost-effective and efficient alternative for manure collection and RNG production.

Clean Energy has elected to move forward with three RNG projects with Maas Energy Works after finalizing diligence. All demonstrating strong economic viability, the projects are forecasted to cost $80 million and are on track for completion in 2026.

Clean Energy still has the rights to develop the other remaining projects at a later date as market conditions and project economics evolve.

Agriculture accounts for nearly 10 percent of U.S. GHG emissions and the transportation sector accounts for another 28%, according to the U.S. Environmental Protection Agency. Capturing methane from farm waste lowers these emissions. RNG, produced by that captured methane and used as a transportation fuel, significantly lowers GHG emissions on a lifecycle basis when compared to diesel. This allows RNG to be one of the only fuels to receive a negative carbon-intensity score based on the reduction of emissions at the source and at the vehicle.

About Clean Energy

Clean Energy Fuels Corp. is the country’s largest provider of the cleanest fuel for the transportation market. Our mission is to decarbonize transportation through the development and delivery of renewable natural gas (RNG), a sustainable fuel derived by capturing methane from organic waste. Clean Energy allows thousands of vehicles, from airport shuttles to city buses to waste and heavy-duty trucks, to reduce their amount of climate-harming greenhouse gas. We operate a vast network of fueling stations across the U.S. and Canada as well as RNG production facilities at dairy farms. Visit www.cleanenergyfuels.com and follow @ce_renewables on X and LinkedIn.

About Maas Energy Works

Maas Energy Works is a family-owned renewable energy business with headquarters in Redding, California. We develop, own, and operate renewable energy facilities by partnering with dairy families to create biogas out of cow manure and other organic wastes. We then use that biogas to generate vehicle fuel, electricity, heat, CO2, and soon, hydrogen. Our founders Daryl and Christianna Maas believe this waste-to-energy transformation demonstrates our belief that God created humanity in His image to redeem and create. Our 215 employees operate with excellence the nation’s largest fleet of over 80 dairy digesters in 9 states.