List and define the two main problems when heavy pumping of wells occurs?

1. The multistory apartment culture in every city has given rise to sink bore wells as deep as 1000 feet. This resulted in total draining of under ground water and thus resulted in depleting water levels.

2. Lack of replenishment of underground water. New style constructions including roads and buildings totally cover the surface with no chance of water seeping down.

3. Cutting of trees. Trees used to hold water and release it to ground.