Quiz #4

Term
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A majority of the loss of the tropical forests has occurred over the past 200 years.
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Terms in this set (18)
A majority of the loss of the tropical forests has occurred over the past 200 years.
false
Marine Protected Areas are the only areas in the ocean where fish are totally protected from human activities.
false
Governments around the world give a total of more than $30 billion per year in subsidies to fishers, which partly contributes to overfishing.
true
Creating and restoring wetlands has become a profitable business.
true
About 10% of the wading birds in the Everglades National Park have vanished.
false
Oceans will become more acidic as a result of the absorption of carbon dioxide.
true
Someday, tree plantations may supply most of the world's demand for industrial wood.
true
Forest fires are not a major threat to forest ecosystems as part of a natural cycle.
true
Burning tropical forests accounts for how much of the human-created greenhouse gas emissions?
17%
Robert Costanza of the University of Vermont estimates the monetary worth of the earth's ecological services per year at which of the following?
$33.2 trillion
Over the past 8,000 years, human activities have reduced the earth's original forest cover by about_____%, with most of that coming in the last 60 years.47Which of the following is a disadvantage of clear-cutting?destroys and fragments wildlife habitatsForests provide habitats for about______of the earth's terrestrial species.two-thirdsThe traditional approach to estimating fish populations is the______.maximum sustained yieldWhat percentage of the world's oceans is fully protected, and closed to fishing and other harmful human activities?0.8%The Columbia River dam system has benefited many people, but it has______.sharply reduced populations of wild salmonWhat is CITES?a treaty banning trade in endangered speciesIn 1968, the U.S. Congress passed the_____to establish protection of rivers with outstanding wildlife, geological, scenic, recreational, historical, or cultural values.National Wild and Scenic Rivers Act