Air is often much cleaner after a rain primarily because

A: droplets and crystals scavenge particulates

B: particulates act as condensation nuclei

C: gravitational settling works faster when the air is saturated

D: the lower temperature increases the efficiency of automobile engines

A: droplets and crystals scavenge particulates

Explanation:

The air pollution is down after the rainfall as the particles or the pollutant are scavenged or discharged and collects as waste and fall down due to the heavy moisture contents and the raindrops. Hence also involve the flow of the clear and swift air to move them away thus the air pollution gets decreased after the precipitation.

Master planned communities outside of chicago. note: population density means people living in an area per square mile. chicago, an urban and highly populated area has a much more higher density than a desert, amish community, settlement, or nomadic region.

Answerhave flowing water either episodically or during only a portion of the year;