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The top documents tagged [gases argon]
ATMOSPHERE
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The Atmosphere. Characteristics of the Atmosphere blanketIt is a blanket of moisture-filled air that surrounds the earth It consists 78% nitrogen, 21%
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Air Pollution (التلوث الهوائي). Air pollution هو وجود أي مواد صلبه أو سائلة أو غازية بالهواء بكميات تؤدي إلى أضرار
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