Answer:
:
Explanation: 2 Marks
Example: 1 Mark
Untreated human excreta is a health hazard. It may cause water pollution and soil pollution. Both the surface and groundwater get polluted.
Groundwater is a source of water for wells, tube wells, springs, and many rivers. Thus it becomes the most common route for waterborne diseases.
Poor sanitation and contaminated drinking water is the cause of a large number of diseases.
They include cholera, typhoid, polio, meningitis, hepatitis, and dysentery.