The combination of expanding human populations, over-exploitation of resources, and eventual environmental collapse
A) is not a danger to modern humans because global population size is declining
B) was a danger faced by technologically simple early civilizations only
C) is a danger humans are facing today for the first time
D) resulted in the disappearance of some early civilizations
E) posed no danger to humans prior to the Industrial Revolution
D
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If a monopolistically competitive firm is producing 9,000 units of output and at this output level, the price is $10 and the average total cost is $10, the firm profit/loss is equal to ________ and it ________ possible for the firm to be in long-run equilibrium.
A) $0; is B) $900; is C) $0; is not D) $900; is not
Even prior to Darwin's publication, many European naturalists accepted the idea that life had evolved
a. True b. False Indicate whether the statement is true or false
Nation-states routinely wish to settle pastoral nomads for all of the following reasons except:
a. to exert political authority over them b. to tax the nomads for their animals and land use c. to encourage them to raise surplus animals d. to allow them to have a voice in leading the country
Before the AIDS epidemic in Africa, Zimbabweans had a life expectancy of 61 years. But by 2000, this figure dropped to
a. 35. b. 45. c. 60. d. 55. e. 40.