Answer:
B. A chemist
<em>Hope it's help :)</em>
The two sublevels are s and p. These are the main group sublevels
There are four main types of air pollution sources:
<span>mobile sources – such as cars, buses, planes, trucks, and trainsstationary sources – such as power plants, oil refineries, industrial facilities, and factoriesarea sources – such as agricultural areas, cities, and wood burning fireplaces<span>natural sources – such as wind-blown dust, wildfires, and volcanoes........hope i helped</span></span>
Answer:
community according to me
