The Montreal Protocol of 1987 was an international treaty that halted the production of ________
A) nuclear weapons
B) carbon dioxide
C) water vapor
D) automobiles
E) chlorofluorocarbons
Answer: E
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The republics of the former Soviet Union were established based on
A) economic contributions. B) national resources. C) ethnic lines. D) religious values. E) linguistic lines.
Most people are homeless because they
A) cannot afford housing and lack a regular source of income, perhaps because of job loss, mental illness, or family problems. B) cannot afford medicine and lack a middle-class source of income, usually because of mental illness, pregnancy, and family problems. C) fail to achieve the level of "survival of the fittest" as prescribed by social Darwinism. D) cannot afford a college education, which is required in order to obtain and maintain a steady job in the United States. E) are lazy or lack the kind of work ethic that wealthy people have.
Everything else being equal, unconsolidated Earth material on a steep slope will be more likely to move by mass wasting than the same material on a lower slope
Indicate whether the statement is true or false
Ethanol, once widely used in gasoline (to make "gasohol"), is no longer used in gasoline, because there is no longer a worldwide shortage of petroleum fuels.
Answer the following statement true (T) or false (F)