Rachel Carson's book Silent Spring showed that
A) pesticides like DDT were ineffective in killing crop pests.
B) scientific expertise can help shape positive environmental policies.
C) industries producing harmful chemicals welcomed scientific evaluation of their environmental impact.
D) biodiversity could be increased with cautious use of DDT.
B
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A quick pull on a sheet of paper beneath a box of crackers doesn't topple the box, best illustrates that
A. the box has inertia. B. there is an action-reaction pair of forces. C. gravity tends to hold the box secure. D. the box has no acceleration.
Desertification is taking place in the Sahara but not in the developed world. Indicate whether the statement is true or false
Plate tectonics explains past processes that shaped Earth but not present-day processes.
Answer the following statement true (T) or false (F)
An inversion:
A) implies that a layer of air is unstable. B) means that a layer of air is overturning. C) indicates that a layer of air is stable. D) has no significance as far as a meteorologist is concerned.