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1.biofuel(n.) a fuel (as wood or ethanol) composed of or produced from biological raw materials
ex : Biofuels are made from crops such as sugar.
2.hydropower(n.)hyreoelectric power
ex : Hydropower uses the force of moving water.
3.infinite(a.)extending indefinitely
ex : She has infinite patience when she's dealing with children.
4.politician(n.): a person engaged in party politics as a profession
ex : He is a great politician.
5.foul(a.):filled or covered with offensive matter
ex : The weather has been foul all week.
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