| Answer | Crossword Clue |
|---|---|
| PCBS | Pollutants banned since the '70s |
| PBS | Pollutants banned since the 1970s |
| PCBS | Toxic pollutants banned since the 1970s |
| PCBS | Industrial compounds banned in the USA since the late '70s |
| PCBS | Toxins banned in the '70s |
| DDT | Pesticide banned in the '70s |
