Question

the untreated human excretra is a health hazard. how?...

Answer 1

Untreated human excretions are a health hazard. It causes pollution of soil and water including the underground water. ... When this contaminated water is used for drinking, it can cause diseases such as cholera, typhoid, hepatitis, dysentery, etc., which may even lead to death.

Answer 2

the insects will be attracted and will spread many germs and will cause diseases.