The SO2 emissions displayed in this map derive mainly from the
A. burning of coal from non-point sources.
B. automobile emissions from point sources.
C. burning of coal from point sources.
D. automobile emissions from non-point sources.
Answer: C
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Waste that is neither liquid nor gaseous is called ________ waste.
Fill in the blank(s) with the appropriate word(s).
When a woman stands at rest with two feet on a scale, the scale reads 500 N. When she gently lifts one foot, the scale reads
A) less than 500 N. B) more than 500 N. C) 500 N.
The two techniques that are most commonly used to mine coal are ____________________ and
____________________. Fill in the blank(s) with the appropriate word(s).
Which characteristic is a disadvantage of hydroelectric plants?
A. low net energy B. large land disturbance C. little untapped potential D. high-cost electricity E. high emissions of carbon dioxide