When was biofuels made?

Biofuels have been used in various forms for centuries, with early examples including ethanol produced from fermented crops and biodiesel derived from vegetable oils. However, modern biofuels gained significant attention in the late 20th century, particularly in the 1970s during the oil crises, which spurred interest in alternative energy sources. The development of biofuels like ethanol and biodiesel as viable options for transportation fuel has continued to evolve, especially in the 21st century, driven by environmental concerns and energy security.