Answer: because they are situated near aquifers
Explanation:
Aquifers is a underground layer of rock which can hold and release water in desirable amounts so petroleum industries claims the well are safe.
When babies are born, their brains contain about a hundred billion of neurons. However, a few of these brain cells are connected. At age three, there are one thousand trillion connections formed. The brain starts to cut off unused connections at the age of eleven.
The process responsible for this is mass movement.
