| Toxic pollutant, for short | 26 |
| Toxic pollutant banned since the 1970s | 38 |
| Toxic environmental pollutant, for short | 40 |
| Toxic chem. | 11 |
| Pollutant found in NCR paper | 28 |
| Pollutant banned in the U.S. in 1979 | 36 |
| Pollutant banned by the EPA | 27 |
| Pollutant banned by Cong. in 1979 | 33 |
| Outlawed pollutant, for short | 29 |
| Hudson River pollutant, initially | 33 |
| Hudson River pollutant | 22 |
| Environmental pollutant, for short | 34 |
| Environmental acronym | 21 |
| E.P.A.-proscribed compound, for short | 37 |
| Controversial chemical | 22 |
| Chemical pollutant, for short | 29 |
| Chemical pollutant | 18 |
| Chemical contaminant, for short | 31 |
| Chemical banned by the EPA in 1977 | 34 |
| Chem. source of the Hudson's River's Superfund site status | 66 |
| Chem. contaminant banned by the U.S. in 1979 | 44 |
| Banned toxic pollutant, for short | 33 |
| Banned organic compound, for short | 34 |
| Banned chemical pollutant, for short | 36 |
| Banned chem. pollutant | 22 |
| Banned chem. | 12 |
| A water pollutant | 17 |
| Banned pollutants, briefly | 26 |
| EPA-banned chemicals | 20 |
| Environmental toxins | 20 |
| Dumpsite pollutants, for short | 30 |
| Chem. pollutants | 16 |
| Banned pollutants | 17 |
| Banned environmental toxins, for short | 38 |
| Toxic pollutants banned since the 1970s | 39 |
| Toxic pollutants | 16 |
| Toxic chemical compounds, briefly | 33 |
| Toxic chemical compounds in industrial waste, briefly | 53 |
| Toxic chem. pollutants | 22 |
| They've been banned in the U.S. since '79 | 49 |
| They were banned in 1975 | 24 |
| Some environmental toxins, briefly | 34 |
| Some coolant fluids, for short | 30 |
| Potential landfill pollutants, for short | 40 |
| Pollutants banned since the '70s | 36 |
| Pollutants banned in the '70s | 33 |
| Pollutants banned in 1975 | 25 |
| Outlawed pollutants in the U.S. | 31 |
| Noxious compounds, briefly | 26 |
| Long-lived pollutants | 21 |
| Industrial pollutants banned in 1975 | 36 |
| Industrial compounds banned in the USA since the late '70s | 62 |
| Hudson River pollutants, initially | 34 |
| Highly toxic pollutants | 23 |
| Highly toxic environmental pollutants, for short | 48 |
| Environmental toxins, for short | 31 |
| Environmental toxins (abbr.) | 28 |
| Environmental pollutants, for short | 35 |
| Environmental hazards, briefly | 30 |
| E.P.A. targets | 14 |
| Chemicals banned by Congress in '76 | 39 |
| Chem. contaminants | 18 |
| Cancer-causing compounds | 24 |
| Banned chemicals still found in the environment | 47 |
| Banned chemicals | 16 |
| Classroom with mice | 19 |
| School area with mice | 21 |
| Techie's hangout | 20 |
| Techie training site | 20 |
| Room with many mice | 19 |
| Programming class setting | 25 |
| Hi-tech students' haunt | 27 |
| Hi-tech classroom | 17 |
| Where many students click | 25 |
| Techies' campus hangout | 27 |
| Techie's campus hangout | 27 |
| Students' workplace with mice | 33 |
| Site of campus workstations | 27 |
| Programming class locale, perhaps | 33 |
| Place to train with mice | 24 |
| Place for a programming class, perhaps | 38 |
| Graphic design school feature | 29 |
| Data processing room | 20 |
| Computer class setting | 22 |
| Campus home for mice | 20 |
| Angel dust | 10 |
| Angel dust, for short | 21 |
| Phencyclidine, on the street | 28 |
| Angel dust, briefly | 19 |
| Lacing agent | 12 |
| Angel dust, initially | 21 |
| Trip provider | 13 |
| Tranquilizer drug, for short | 28 |
| Supergrass | 10 |
| Street drug | 11 |
| Psychosis-mimicking drug | 24 |
| Psychedelic stuff | 17 |
| Narc's find, for short | 26 |
| LSD alternative | 15 |
| It can assist in your enjoyment of some psych rock | 50 |