Question

Sewage wastes should be treated well to remove ______ substances, before being released into water. (green/toxic)

Answer 1

Sewage water treatment:

1. The sewage water is wastewater that is released from the households after serving various purposes like washing, bathing, etc.
2. Sewage water treatment is a type of treatment in which the wastewater is treated well to remove toxic contaminants like organic materials, cadmium, lead, nitrogen, etc, before being released into the water bodies like rivers, lakes, etc.

Final answer: Sewage wastes should be treated well to remove toxic substances, before being released into water.