Related Clues:

• Grp. that rates
• Smog-battling org.
• Pollution stds. setter
• Tour grp.
• Ernie Els's org.
• Mileage testing grp.
• Links letters
• Kind of rating
• Emissions control grp.
• Waste watchers: Abbr.
• Org. concerned with emissions
• M.P.G. determiners
• Tour operator
• Org. for swingers?
• Masters holder: Abbr.