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Energy Resources
The second fastest-growing source is ________.
solar
wind
hydro
natural gas
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rikazzz
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Energy Resources
Although solar-PV-generated electricity as a power source is cleaner than burning fossil fuels, the problem with this electricity is that it ________.
is dangerous if stored too long
cannot be stored easily in large quantities for use when and where it is needed
is not sufficiently understood
will be replaced shortly with other sources of power for homes
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rikazzz
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Energy Resources
A fuel cell, in order to produce electricity, burns:
Helium
Nitrogen
Hydrogen
None of the above
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rikazzz
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