Alternative fuels include biomass, natural gas, and electricity. Biomass is organic material from living or recently living organisms that can be converted into fuels like ethanol, methanol, and biodiesel. Ethanol is produced from biomass through a four step process of photosynthesis, harvesting, fermentation, and processing. Methanol is typically made from natural gas or coal but can also be made from biomass. Biodiesel is made from vegetable oils, animal fats, algae, or used cooking grease.
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