Which common problem of U.S.cities is now an issue in United States national parks?
A) homeless people
B) lack of funding for schools
C) air pollution
D) high crime rates
E) alcoholism

Question

Which common problem of U.S.cities is now an issue in United States national parks?​
A) ​homeless people
B) ​lack of funding for schools
C) ​air pollution
D) ​high crime rates
E) ​alcoholism

Quizplus · Accepted Answer

Air pollution has become a common problem in many U.S. cities and is now also an issue in some United States national parks. The pollution is often caused by nearby factories, power plants, and transportation emissions. This can have serious consequences for both the environment and the health of wildlife and visitors to the parks.

Which Common Problem of U