Renewable fuels are energy sources derived from resources that are naturally replenishing. Unlike fossil fuels, which take millions of years to form, renewable fuels come from sources that can be replenished on a human timescale, such as biomass, sunlight, wind, and water. In the context of catalysis, renewable fuels often involve the transformation of biomass or other renewable sources into usable forms of energy like bioethanol, biodiesel, and green hydrogen.
