The land tragedy, also known as the public tragedy, only enjoying the departure from your own private gain, striving for more interests, and there is a cost of paying.
not a land tragedy?
A group of herdsmen graze together on a public grassland. Many herdsmen want to raise more sheep to increase their personal income. As a result, the grassland continues to deteriorate until they can't raise sheep, which eventually leads to the bankruptcy of all herdsmen