Possible Clues:

• Reading a composition about waste water
• Doctor again involved with point of sewage system
• What takes time after day with wet weather?
• Disposal of waste water
• At last the wet time all goes to waste
• In the end the wet period all goes to waste
• Doctor again involved on a point of sanitation
• Waste resources to make gardenia develop
• It's poor on the moor
• What a waste pipe provides