Enjoy the ride while the water is good. They chatter and laugh along the way. And look, the water is no longer clean. It's beginning to look a bit green and brown. Yes friends, that is because the water downstream becomes polluted.
Fishes take oxygen from water .
But as the water gets polluted, oxygen levels in water come down drastically. Fishes do not have a choice and have to take in some polluted water and their gills get blocked with pollutants. They die because of this. This water is not safe for me. You must not risk your life.