Alternative fuels, known as non-conventional or advanced fuels, are any materials or substances that can be used as fuels, other than conventional fuels. Conventional fuels include: fossil fuels (petroleum (oil), coal, propane, and natural gas), as well as nuclear materials such as uranium and thorium, as well as artificial radioisotope fuels that are made in nuclear reactors.

1. The use of alternative fuels is becoming more widespread as governments and industries focus on reducing carbon emissions.
   隨著各國政府和企業(yè)集中精力減少碳排放，替代燃料的使用正變得越來越普及。
2. Electric cars are powered by alternative fuels such as electricity from renewable sources like solar or wind energy.
   電動汽車由替代燃料驅(qū)動，如來自太陽能或風能等可再生資源的電力。
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