What problems did the construction of the Aswan High Dam create for the people of Egypt and their environment?

If the Aswan High Dam were to be destroyed, the Nile Valley would be hit with a wall of water that would not be able to stop until it reached the Mediterranean Sea. A destructive wall of water moving north would reach every major city in Egypt, and afterwards the country would have little access to clean water.

Explanation:

1."lessen the worth of ."

2."increase the worth of."

3." beyond the worth of."

4."against the worth of ."