Related Clues:

• It banned DDT
• British Open org.
• Clean air agcy.
• Govt. org. with a flower in its logo
• Jack Nicklaus org.
• Pro golfer's org.
• Fed. cleanup group
• Anti-smog gp.
• Energy Star org.
• Air quality org.
• Gov. air-monitor
• Pesticide-regulating org.
• UV index monitor
• Tiger's gp.
• Regulating org.