Related Clues:
- Kyoto Protocol concern: Abbr.
- Rachel Carson's sci.
- Banned pesticide whose discoverer won a Nobel Prize
- Sci. founded by Danish botanist Eugen Warming
- "Green" sci.
- Green movement's concern: abbr.
- 'Silent Spring' subject
- Outlawed killer
- EPA-banned pesticide
- Prohibited bug spray
- Toxic spray
- Banned insecticide letters
- Sci. specialty
- Environmentally-destructive pesticide
- Reforestation subj.