| Answer | Crossword Clue |
|---|---|
| PBS | Pollutants banned since the 1970s |
| PCBS | Toxic pollutants banned since the 1970s |
| PCBS | Pollutants banned since the '70s |
| PCB | Toxic pollutant banned since the 1970s |
| HAVANAS | They've been banned from the US since '62 |
| DDT | It's been banned in the U.S. since 1972 |
| PCBS | They've been banned in the U.S. since '79 |
| PCBS | Industrial compounds banned in the USA since the late '70s |
