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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The two techniques that are most commonly used to mine coal are ____________________ and
____________________. Fill in the blank(s) with the appropriate word(s).
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.
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