What effect has urbanization had on air pollution in the United States and around the world? A. People driving fewer cars results in more air pollution.
B. Providing less mass transportation leads to less air pollution.
C. Increased combustion causing more air pollution.
D. People driving more cars leads to less air pollution.

C. Increased combustion causing more air pollution.

Explanation:

"Urbanization" refers to a situation wherein many people move to the city to live and leave the rural area behind. This means that the population of the city  increases. The more people living in the city, the more vehicles there are. Vehicles work through combustion, which produces pollutants into the air. So this means that the increasing number of vehicles results to an increasing amount of air pollution.

answer; i believe that the correct answer is ; the eastern and western churches spoke different languages;

the answer your looking for is c. : )