Explain some house keeping practices to minimise waste at their source.

Discussion in 'CBSE Class 7 Science Help' started by g mahesh, Nov 11, 2013.

  1. g mahesh

    g mahesh Member

    (i) Cooking oil and fats should not be thrown down the drain. They can harden and block the pipes. Throw oil and fats in the dustbin.

    (ii) Chemicals like paints, solvents, insecticides, motor oil, medicines may kill microbes that help purify water. So do not throw them down the drains.

    (iii) Used tea leaves, 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 oxygen. This hampers the degradation process.

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