Air pollution in worse in which areas?

a. rural
b. mountain
c. coastal
d. urban

D

Explanation:

Urban areas contain a lot of pollution due to gasoline cars spitting out bad air. Urban areas are cities which are full of people and pollution.

Urban area (d)

HOPE THIS ANSWER WAS USEFUL

the first phase of the government’s plan for settlement was building the transcontinental railroad. the railroad provided a way to bring settlers and manufactured goods west and ship their agricultural and mining produce east. the transcontinental railroad was an essential artery for rapid development of the frontier.

the second phase of the government’s plan was a liberal land distribution policy that made it possible for many people to homestead. with these two key elements—transportation and cheap land—the government rapidly achieved its goal of persuading people to move west, settle on farms, and push back the frontier.

because the two particles have an equal charge, the charges will cancel out and give the atom an overall charge of 0. so, if at atom has 35 protons in the nucleus, we could expect it to have 35 electrons orbiting that nucleus.