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Easy Renewable Energy

Which gas makes up most of the energy content in biogas?

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Easy Renewable Energy

Which renewable fuel is made by fermenting cellulose-rich plant material into alcohol?

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Hard Renewable Energy

Which solar-thermal power station in California began operating in 1984 as the first commercial parabolic-trough plant?

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Hard Renewable Energy

Which wind turbine, built in Vermont in 1941, was the first megawatt-scale wind turbine?

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Intermediate Renewable Energy

Which experimental house, completed in 1948, is recognized as one of the first modern solar-heated homes?

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