Related Clues:

• Emissions-regulating org.
• Clean air org.
• Favorite project
• Assessors of m.p.g.
• Smog-fighting grp.
• See 90-Across
• Raters of m.p.g.
• Org. that may be involved in a cleanup
• Gas-mileage grp.
• King's ''--- Sematary''
• Kennel's client
• Clean Air Act enforcer: Abbr.
• Black cat, perhaps
• Fed. pollution monitor
• Air-monitoring org.