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Ninety nine percent of the atmosphere is composed of _____ and _____. water vapor, carbon dioxide nitrogen, oxygen nitrogen, carbon dioxide oxygen, carbon dioxide
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Ninety nine percent of the atmosphere is composed of _____ and _____. water vapor, carbon dioxide nitrogen, oxygen nitrogen, carbon dioxide oxygen, carbon dioxide

User Ravi Khambhati
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Oxygen and Nitrogen.


;) <3

User Thunderbird
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Hey there!
Ninety nine percent of the atmosphere is composed of oxygen and nitrogen! The atmosphere is composed of 78% nitrogen and 21% oxygen!
Hope it helps :D
User HenryTK
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