Question

4. Digging wells deep into the ground is not considered safe for health why ?​

Answer 1

Explanation:

Water pumped from bores deeper than 400 feet has a high level of heavy metals like arsenic, iron, fluoride and other nitrates which are extremely poisonous, yet most people are unaware of this fact.

Answer 2

Explanation:

Water pumped from bores deeper than 400 feet has a high level of heavy metals like arsenic, iron, fluoride and other nitrates which are extremely poisonous, yet most people are unaware of this fact. ... The deeper the bore well, the higher the level of fluoride it contains.