The author argues that the “hidden subsidy” for automobiles is an example of which of the following?
a) Negative externalities
b) Evidence that private transportation pays for itself
c) The unseen pollution produced by car exhaust
d) The added benefits that private autos provide the economy
a) Negative externalities
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The difference between lightwaves approaching and lightwaves receding is
A. when approaching, lightwaves have higher frequency; when receding, their frequency is lower. B. the frequency of approaching lightwaves remain constant, while receding lightwaves are invisible. C. when approaching, lightwaves have lower frequency; when receding, their frequency is higher. D. There is no difference.
If we are to follow nature's three scientific principles of sustainability (introduced in Module 1, p. 25-26), which should we start relying on more to meet our needs?
A. Renewable energy sources B. Nuclear energy C. Fossil Fuels D. Non-renewable energy sources
Organisms that are attached to the bottom of an aquatic ecosystem are termed pelagic.
Answer the following statement true (T) or false (F)
How many substances is the EPA responsible for monitoring?
A. 657 B. 500 C. 275 D. 1,000