The main difference between air pollution problems today and problems in the past is
A)global warming.
B)less polar ice.
C)it is now a worldwide problem.
D)less rainfall.

Question

Quizplus · Accepted Answer

In the past, air pollution was largely localized and limited to specific regions or cities. However, with the growth of transportation, international trade, and industrialization, air pollution has become a worldwide problem affecting the entire planet. The other options, such as global warming, less polar ice, and less rainfall, are all consequences of air pollution rather than differences between past and present air pollution problems. Therefore, option C is the best choice.

The Main Difference Between Air Pollution Problems Today and Problems