CLEANAIR
| Date | Clue |
|---|---|
| 2017-08-03 | Concern for the E.P.A. |
| 2006-06-15 | Environmentalists' cause |
| 2003-05-15 | Environmental concern |
| 1999-05-20 | Kind of act passed in 1970 |
| Date | Clue |
|---|---|
| 2017-08-03 | Concern for the E.P.A. |
| 2006-06-15 | Environmentalists' cause |
| 2003-05-15 | Environmental concern |
| 1999-05-20 | Kind of act passed in 1970 |