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| pollutant Any substance, usually a residue of human activity, which has an undesirable effect upon the environment | |||
| contaminant: 36 phrases in 1 subject |
| Environment | 36 |
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| |||
| pollutant Any substance, usually a residue of human activity, which has an undesirable effect upon the environment | |||
| contaminant: 36 phrases in 1 subject |
| Environment | 36 |