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"Fossil fuels" refers to:

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The best type of coal in terms of purity is:

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Coal liquefaction refers to the process of:

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The main method of natural gas transportation is:

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Crude oil is called "sweet" if:

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We use most of our oil products for:

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Effects of acid rain include:

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Ways we utilize energy from the sun include:

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Types of spontaneous radioactive decay include:

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Which sector of society uses the most energy?

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Energy efficiency is defined as:

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Electrical energy can be obtained from which of the following?

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Solar, geothermal, wind, biomass, and hydropower are considered renewable because they:

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Compared to fluorescent bulbs, incandescent light bulbs:

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Global warming primarily is concerned with the increase of which gas in the atmosphere?

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