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

Environmental & Atmospheric Sciences

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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.

Environmental & Atmospheric Sciences

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

Environmental & Atmospheric Sciences

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.

Environmental & Atmospheric Sciences

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

Environmental & Atmospheric Sciences