The tragedy of the commons refers to
a. overuse of privately held resources
b. overuse of shared common resources
c. human deaths from polluted shared resources such as air or water
d. government over-regulation of fresh water use
e. a Shakespeare play
B
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The Trail of Tears represented for America's indigenous population
A) legally mandated forced migration. B) voluntary relocation fraught with high death tolls. C) forced relocation of male family members. D) voluntary relocation of male family members. E) legally mandated forced relocation of children to new schools in the west.
Where does the quartz in granite typically end up?
A) As small clay minerals that are deposited in lakes and the sea B) Quartz does not weather and so it keeps the granite from weathering C) As sand in rivers, dunes, and beaches D) It is converted into feldspar and weathers into clays.
Diamonds have been found during mining in offshore ____________ deposits in Australia and Africa. Fill in the blank(s) with the appropriate word(s)
A number of hydroelectric dams are now scheduled for dismantling. What is the main reason for this?
a. Their structure has weakened. b. New findings about the potential for large earthquakes have been discovered. c. Cheaper and cleaner sources of electrical power have been found. d. Environmental concerns must be addressed before a dam can be relicensed. e. The demand for irrigation water has decreased.