Possible Clues:

• Community of organisms and their environment
• Coral reef, e.g
• Community of organisms
• Drug check protecting friendly community and its environment
• Self-contained community of plants and animals and their physical environment
• English firm has technique for orderly collection of organisms
• Biological community with its environment
• English check over comfortable environment
• Environmentalist's first comfortable issue?
• Intimate check on European Community and its environment