The article discusses the ongoing efforts in the trucking industry to enhance efficiency and reduce emissions amidst uncertain emission standards post-President Trump's tenure. While traditional focus has been on battery electric motors, attention is shifting towards renewable diesel, hydrogen, and natural gas as viable alternatives. The Cummins X15 engine series, catering to advanced diesel, natural gas, and hydrogen, aims for enhanced performance, fuel economy, and reduced emissions. Field testing with the Cummins X15N natural gas engine and Allison transmission showcased improved fuel efficiency and performance. Clean Energy is expanding its renewable natural gas (RNG) footprint, offering fleets emissions reductions and access to alternative fuel stations. The U.S. Department of Energy highlights hydrogen as a zero tailpipe emissions alternative fuel, with efforts to expand fueling infrastructure and increase fuel cell electric vehicles in the freight industry. While acknowledging the potential of battery-electric fuel cells in the future, the industry currently relies on ICE technology with continuous advancements for eco-friendly operations.