Biodiesel is America's first advanced biofuel – a renewable, clean-burning diesel replacement that is reducing U.S. dependence on foreign petroleum, creating green jobs and improving our environment. Made from an increasingly diverse mix of resources such as agricultural oils, recycled cooking oil and animal fats, biodiesel meets the strict specifications of ASTM D6751. The National Biodiesel Board (NBB) is the national trade association representing the biodiesel industry in the United States.