In the Sahel, desertification is likely to continue because of ________
A) perennial drought
B) mistakes of the United Nations
C) expanding population
D) decreasing numbers of grazing animals
E) the presence of the Sahara to the north
Answer: C
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Countries in which governments offer increased subsidies and tax breaks for reusing and recycling materials are more environmentally sustainable than those that do not
Indicate whether the statement is true or false
What is the main species of whale that is targeted by whalers?
a. humpback whales b. Fin whales c. Sei whales d. Minke whales e. Blue whales
The first widespread use of the nation-state concept came in
A) Mesopotamia. B) the Roman Empire. C) Western Europe. D) the United States. E) Southeast Asia.
Suppose the albedo of a planet is measured to be 40 percent. This means that:
A) 60 percent of the Sun's energy is reflected. B) 40 percent of the Sun's energy is reflected. C) more energy is reflected than absorbed. D) 40 percent of the Sun's energy is absorbed.