Related Clues:
- Environmentalist's maj.
- Target of a 1972 ban
- Banned insecticide (Abbr.)
- Modern sci. course
- Earth sci.
- Insecticide banned since 1973
- Bionomics: Abbr.
- Banned insecticide, for short
- Banned insecticide
- Earth Day subj.
- Old agricultural letters
- Strong pesticide
- Park ranger's study: Abbr.
- Chloral derivative, for short
- Life sci.