What chemical compound produces depletion of the ozone layer?

a. Carbon tetrachloride.
b. Chlorofluorocarbon.
c. Hydrogen fluoride.
d. Mercury sulfide

b. Chlorofluorocarbon.

Political Science

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If we were doing a study in which we wanted to apply the findings to the whole population of the United States, it would be necessary to

A) Draw a nonrandom sample from the entire U.S.A. B) Take a random sample from the entire U.S.A. C) Use only participants from our local area. D) Use a nonstratified local sample.

Political Science

Which of the following statements best describes the use of indirect lobbying?

a. The use of indirect lobbying has declined since the 1960s. b. Indirect lobbying is used mainly by labor unions. c. Indirect lobbying began with the advent of the Internet in the 1990s. d. Indirect lobbying can be traced back to the nation's early days.

Political Science