Possible Clues:

• Form of pollution a killer? I'll have doctor brought in
• Bill with one way out for pollutant
• Precipitate a Channel Islands evacuation?
• Environmental problem addressed in the Clean Air Act
• Amateur police division ran across individual with environmental concern
• Pollutant found in a Guernsey sewer?
• Perilous drops?
• Harmful drops from out of the blue?
• Area island group use up creating pollution
• Lightning by-product