Why does the book say there are “two” ozone problems?
a) Because there are two sources of the gas implicated in thinning the ozone layer.
b) Because there are two kinds of gases implicated in thinning the ozone layer.
c) Because there is a thinning of the upper atmosphere ozone layer and increasing
ozone at ground level that produces photo-chemical smog.
d) Because ozone holes occur in two places above the earth, over the north and
south poles.
c) Because there is a thinning of the upper atmosphere ozone layer and increasing
ozone at ground level that produces photo-chemical smog.
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DDT
A. became highly concentrated in carnivorous fish and birds. B. affected insects but had little effect on humans. C. was a persistent pesticide. D. All of the statements are correct. E. None of the statements are correct.
Which of the following gases by virtue of its enormous amount in the atmosphere has the greatest impact on global climate change?
A) Methane B) Nitrous oxide C) Carbon dioxide D) Nitrogen
In general, the healthiest soil texture for plants is one in which
A. clay dominates, sands are next highest in concentration, and silt has the smallest concentration. B. there is a relatively even percentage of sand, silt, and clay. C. sand dominates, silts are next highest in concentration, and clay has the smallest concentration. D. sand dominates, clays are next highest in concentration, and silt has the smallest concentration.
Which of the following has become the least willing to sacrifice their environmental quality for some additional economic output?
A. the European Union B. China C. Ohio D. command economies