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>
The answer is D. 459 g As
Repeatable
If it’s repeatable and you get the same answer constantly then it’s a good and accurate experiment
i think that it is the tree
