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| the condition of earth's atomosphere patictular time and place. |
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| the mixtur of gases that surrounds earth. |
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| a form of oxygen that has three oxygen that has three oxygen atoms in each molecule insted of the usual two. |
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| the invisable , gaseous form of water. |
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| harmful substances in the air, water, or soil. |
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| a brownish haze that is a mixture of ozone and other chemical, forms when nitrogen oxides, hydrocarbans, and other pollutants react with one another in the presence of sunsight. |
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| rain that is more acidic than normal. |
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| the amount of mass in a given space. |
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| an insturment used to measure cahnges in air pressure. |
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| an inturment that measueres air pressure. |
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