Q.3 Why should oils and fats be not released in the drain? Explain.

Oils and fats are not released in the drain because

(1) Oils and fats are not released in the drain because oil is not dissolved in water and it floats on water.

(2) Oils and fats harden and block the sewage pipes.

(3) In an open drain also, fats block the porosity of soil which affects its water filtering efficiency.

(4) It can clog the drains and can affect aquatic life if released into the water body.