Global warming and climate change is a long term change in the weather patterns that characterize the regions of the world. Raised temperature increases the intensity of evaporation and rate of falling of condensed water vapor is 10-25% folder larger than the rate of evaporation. The associated effects are the changing precipitation and cyclone patterns and the productivity of agriculture. The modest alteration in the precipitation process and winds do not bring much change but consequently leads to dry area becoming more drier and wet areas becoming wetter. These changes are projected to continue in the future. The falling of condensed water vapor occurs as rain rather than rainfall with the rising temperature and snow melting at high rate, there is runoff and risk of flooding that has increased but risk of drought has increased in some areas due to high rate of evaporation.