Related Clues:

• Fed. regulator since 1970
• Clean-air org.
• Clean air gp.
• Rater of m.p.g.
• MPG monitor
• Grp. involved in a cleanup
• MPG rater
• U.S. emissions controller
• Ecol. watchdog org.
• Org. concerned with PCB's
• Gov't air checker
• Green grp.
• Pollution-fighting org.
• D.C. watchdog
• U.S. air monitor