What percentage of the world's tropical forests have been cut down for cropland, fuel wood, grazing land and timber?
A) 20%
B) 30%
C) 40%
D) 50%
E) 60%
Correct Answer:
Verified
Q69: Approximately how much of the total U.S.
Q70: Deforestation results in
A) increased air temperatures.
B) decreased
Q71: Man's pollution of public water sources includes
A)
Q72: A benefit of global warming includes
A) farming
Q73: At present rates of clearing and degradation,
Q75: How many humans do not have enough
Q76: Forests serve to
A) hold water.
B) control soil
Q77: Serious detrimental affects of global warming include
A)
Q78: Landfills generally contain
A) all garbage.
B) nonbiodegradable wastes.
C)
Q79: Which is NOT a result or effect
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