The strictest set of laws regulating air pollution were in place following federal action in this year
A) 1963
B) 1970
C) 1977
D) 1990
Answer: D
You might also like to view...
Radiant energy from the Sun is composed of shorter wavelengths than radiation from the Earth because the Sun
A. has a higher temperature than the Earth. B. is an energy source while the Earth is primarily an energy receiver. C. has much more thermal energy. D. none of the above
Which of the following is a characteristic of S-waves?
A. They cannot travel through liquids. B. They displace the rock in a direction that is perpendicular to their travel direction. C. They shear rock from side to side or up and down. D. All of these choices are correct.
The High Plains aquifer
A) has little importance as a freshwater resource. B) was not heavily mined until the 1960s. C) is also known as the Garber-Wellington Aquifer. D) is North America's largest known aquifer system.
The U.S. Endangered Species Act officially expired in
A. 1992 B. 1950 C. 1905 D. 1973 E. 1988