Which of the following are primary renewable energy sources?(Choose 2)

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试卷: LEED v4 GA模拟题B卷[查看]
Which of the following are primary renewable energy sources?(Choose 2)
A: Coal
B: Dung
C: Natural gas
D: Hydro resources

参考答案: BD

本题解释:
正确答案：BD
系统解析: Knowledge Domain: Energy and Atmosphere (EA)

Primary renewable energy sources include: solar thermal, photovoltaic, wind, wave and tidal, low-impact hydroelectricity, geothermal, biofuel, and dung from animals and human excreta (the energy is converted through direct combustion or through anaerobic digestion).
Coal, oil, and natural gas are hydrocarbons and non-renewable energy sources.
Generating and utilizing energy means converting energy from one form into another—energy flow. Energy flow refers to: primary energy (the energy as it is available in the natural environment), secondary energy (the energy ready for transport or transmission), final energy (the energy which the consumer buys or receives), and useful energy (the energy which is an input in an end-use application).

Environmental concerns > sources and energy resources