| Answer | Crossword Clue |
|---|---|
| PCBS | They were banned in 1975 |
| PCBS | They were banned by Congress in 1977 |
| PROS | They were banned from Wimbledon until 1968 |
| PCBS | Pollutants banned in 1975 |
| PCBS | Environmental toxins banned in 1975 |
| PCBS | Industrial pollutants banned in 1975 |
