noun
biofuel
Fuel derived from renewable biological resources, such as plants or organic waste.
バイオ燃料は化石燃料の代替として注目されている。
Biofuels are attracting attention as an alternative to fossil fuels.
Fossil fuels, such as oil and coal, are non-renewable, while バイオ燃料 is renewable.
From English 'biofuel', combining 'bio-' (biological) and 'fuel'.