Dams typically
A) eliminate flooding both upstream and downstream.
B) create important water reservoirs.
C) contribute to global warming and increase aerosol levels.
D) help stabilize estuarine ecosystems.
B
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The example of the Keoladeo Ghana bird sanctuary established in Bharatpur, India demonstrates:
a. that bird populations will increase if given sufficient wilderness in which to propagate. b. that local villagers have a devastating impact on wildlife. c. that humans and nature can coexist in harmony due to their interdependencies. d. that beneficial grazing was successful at overturning governmental ban on cattle grazing.
The process of cloud seeding is based on the theory that:
A) warm clouds will produce more rain if droplets are encouraged to freeze inside the cloud. B) silver iodide crystals act as freezing nuclei and enhance the Bergeron process. C) silver iodide crystals make droplets heavier than usual so that they fall to the ground. D) it is impossible to add too many freezing nuclei; the more you add, the more rain will fall.
Immediately after World War II, new political boundaries resulted in
A) ethnic cleansing in the Balkans. B) policies of acculturation and multiculturalism. C) increased tolerance of differences in ethnicity and religion. D) force migration of millions of Europeans to new territories on the continent. E) economic opportunities that were more evenly distributed between urban and rural areas.
Which of the following is the largest carbon sinks?
A) the atmosphere B) fossil fuels and oil shales C) dead organic matter D) the oceans