Anumber of studies, including the study of six cities, suggest that the largest particles are the most dangerous because they can invade the body's natural defenses and penetrate deeply into the lungs, becoming a chronic source of irritation. a. true b. false

the moon affects the earth gravitation ally, causing certain motions of that body and also producing tides in its ocean and atmosphere. the tidal wave in our atmosphere is, however, far too minute to be an effective cause in any known meteorological phenomenon.

explanation: