On August 10, 1893, mechanical engineer Rudolf Diesel successfully tested the engine that would eventually bear his name. The test took place in Ausburg, Germany. Unlike engines that run on fossil fuels, diesel engines are able to run on biodiesel fuel (fuel made from plant or animal fats).

Biofuels are in many ways preferable to fossil fuels because their supply is easier to replenish. Biodiesel is considered a renewable energy source. The emissions associated with biodiesel are also less harmful to the atmosphere. Honoring Rudolf Diesel's test, International Biodiesel Day is celebrated each year on August 10.

Noun

layers of gases surrounding a planet or other celestial body.

biodiesel
Noun

fuel made at least partly from renewable sources such as soy oil, palm oil, or animal fats.

diesel
noun, adjective

liquid fuel (usually a type of petroleum) used to propel diesel engines. Also called diesel oil and diesel fuel.

engine
Noun

machine that converts energy into power or motion.

fossil fuel
Noun

coal, oil, or natural gas. Fossil fuels formed from the remains of ancient plants and animals.

mechanical engineering
Noun

study of the design, production, and operation of tools and machinery.

replenish
Verb

to supply or refill.