The delicate balance of water being put into and taken out of the earth maintained a natural hydrological cycle world wide, but since man has inhabited the world, the cycle has changed. At first minor changes to the cycle did not really affect the efficiency of the natural balance, but now with the modern population the earth is drastically changing, along with the delicate water balance. For example in Disney's movie "The Lion King" Moofasa the lion king talked about a circle of life and how if one thing is taken out, the whole cycle will change, most times for the worst. This circle of life is also evident in the hydrologic cycle, if humans interfere the consequences can be drastic.