Question

Name three parts of the world that have a great need for wastewater treatment,

and explain each in some detail.

Answer 1

Sewage treatment generally involves three stages, called primary, secondary and tertiary treatment. Primary treatment consists of temporarily holding the sewage in a quiescent basin where heavy solids can settle to the bottom while oil, grease and lighter solids float to the surface.

Step-by-step explanation:

Hope that helps:)