| Answer | Crossword Clue |
|---|---|
| PCBS | Banned pollutants, briefly |
| PCBS | Banned pollutants |
| PCBS | Pollutants banned in 1975 |
| PCBS | Pollutants banned since the '70s |
| PCBS | Industrial pollutants banned in 1975 |
| PBS | Pollutants banned since the 1970s |
| PCBS | Toxic pollutants banned since the 1970s |
