Much of the increasing global need for electricity can be met by solar sources because
A) about 70 of electrical demand occurs when the sun is shining.
B) modern battery technology now makes electrical storage cheap and efficient.
C) only about one square meter of photovoltaic cells are needed to heat a home.
D) even at night most solar power systems run at about 50 of normal capacity.
Question 2
One of the advantages of solar generation over the use of fossil fuels is that solar power
A) can work equally well anywhere in the world.
B) generates electricity every hour of the day.
C) uses less expensive technology.
D) is sustainable.
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The first published illustration of a camera obscura observing a solar eclipse.
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