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Related Clues:
- Hazmat monitor
- Workplace rules setter, for short
- Evil org. in 'The Simpsons Movie'
- Pollution-control grp
- Org. concerned with greenhouse gases
- Ecol. org
- Org. that, when spelled backward, is an old-timey exclamation
- Org. with a radon hotline
- Ecol. grp
- Lab safety org
- Antipollution gp
- Clean Water Act agcy
- Air-quality monitor (Abbr.)
- Org. employing Walter Peck in 'Ghostbusters'
- Org. concerned with 34-Across