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Related Clues:
- Emissions regulator: Abbr.
- Wrestlemania org., once
- MPG determiner
- Air quality watchdogs: abbr.
- Pesticide-banning org.
- Govt. air-quality watchdog
- Ecology org.
- Fed. cleaner-upper
- Org. established by Nixon
- Org. concerned with 10-Across
- DDT-banning entity
- Org. against pollution
- Org. with an Acid Rain Program
- Smog-watching grp.
- MPG-rating org.