Definition
biofuels: fuels that are made from renewable biological products (for example, methane)
- "Recent test flights have succeeded in using a mix of 50% biofuels and 50% traditional kerosene."
- "Environmentalists point out that the production of biofuels isn't entirely green."
- "The biofuels in question were made from algae (aquatic plant-like organisms, but not the kind found in miso soup)."
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