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Environmental sciences
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Environmental technology. Sanitary engineering
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GE1-350
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Q
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QC1-999
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TD1-1066
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chlorofluorocarbons (CFCs)
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tritium (3H)
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atmospheric water budget
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ground ice-melt water
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permafrost
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permafrost thaw
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sulfur hexafluoride (SF6)
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talik
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thermokarst
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