Until regulation of air pollution began in the 1950s, the greatest influence on emissions of air pollutants was/were:
A) lack of education about pollution's ill effects.
B) macroscale atmospheric changes.
C) both economic conditions and population growth.
D) poor technology.

Question

Quizplus · Accepted Answer

Economic conditions and population growth were the greatest influence on emissions of air pollutants before 1950. As industries and populations grew, more and more pollutants were released into the atmosphere. It wasn't until regulations were put into place that emissions began to be controlled. Lack of education about pollution's ill effects and poor technology may have contributed to the problem, but they were not the primary factors driving emissions. Macro-scale atmospheric changes may have affected the dispersion and distribution of pollutants, but they did not drive emissions themselves.

Until Regulation of Air Pollution Began in the 1950s, the Greatest