What does the term 'biodiesel' refer to?

The term 'biodiesel' refers to a renewable fuel made from organic substances, typically vegetable oils, animal fats, or recycled greases. Biodiesel is produced through a process called transesterification, where these organic feedstocks are chemically converted into fatty acid methyl esters (FAME). This fuel can be used in diesel engines either on its own or blended with petroleum diesel, making it an environmentally friendly alternative to fossil fuels.

Unlike fossil fuels, which are finite and contribute to greenhouse gas emissions when burned, biodiesel can be produced sustainably and has lower emissions of harmful pollutants. The focus on renewable resources for biodiesel production underscores its role in reducing dependence on non-renewable energy sources and promoting a sustainable energy future.