Waste generation is a natural part of human activity. But we can limit the type of waste and quantity of waste produced. 

       Cooking oil and fats should not be thrown down the drain. They can harden and block the pipes. In an open  drain the fats clog the soil pores reducing its effectiveness in filtering water. Throw oil and fats in the dustbin.

      Chemicals like paints, solvents, insecticides , motor oil, medicines may kill microbes that help to purify water. So do not throw them down the drain. Used tealeaves, solid food remains, soft toys, cotton, sanitary towels , etc. should also be thrown in the                dustbin. These wastes choke the drains. They do not allow free flow of water. This hampers the degradation process.