Related Clues:

• 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
• Org. that does studies
• Factory-emissions testing grp.
• Clean-air gp.