Biodiesel is a renewable fuel and offers a sustainable and potentially carbon-neutral alternative to petroleum products. Yet production costs remain a hurdle to its widespread use. Now, researchers have developed an inexpensive way to make biodiesel from materials found along the banks of their Louisiana bayou: algae and oyster shells. The researchers will present their results at the spring meeting of the American Chemical Society (ACS Spring 2026), held in Atlanta from March 22 to 26.