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1 3 4 A C D E G H I J L M N O P R S T U V W
Air quality is the composition of the atmosphere in our immediate environment and climate is the average "weather" over a long term period.
Meteoroids, when pieces of asteroids break off. Meteors burn up in the atmosphere.
Scientist use meteors to learn more about the ionosphere, comets, the formation of the solar system and space travel.