Question

why does oil and fats should not be released in the drain ?explain

Answer 1

Oils and fats harden and block the sewage pipes. In an open drain also, fats block porosity of soil which affects its water filtering efficiency. That is why oils and fats should not be released in the drain.

Answer 2

Answer:

Oil and fats should not be released in the drain because they can harden and block the pipes. In an open drain the fats block the soil pores reducing its effectiveness in filtering water.