Most of the U.S. environmental laws now in place were enacted during the ____.
A. 1890s
B. 1930s
C. 1950s
D. 1970s
E. 1990s
Answer: D
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Death Valley is an example of a rain-shadow desert. Indicate whether the statement is true or false
Which one of the following energy sources can rapidly generate the greatest additional power without contributing significantly to global climate change?
A) Solar technologies B) Hydroelectric power C) Nuclear energy D) Geothermal energy
If fire is suppressed in forests that naturally experience frequent fires,
A) nutrient recycling improves. B) grasses are more abundant. C) pines and redwoods are more abundant. D) the frequency of crown fires increases when fire does occur.
Gypsum, which is widely used in plaster and wallboard, is a member of the ________ group
A) sulfate B) halide C) silicate D) carbonate