Climate change is a significant and lasting change in the statistical distribution of weather patterns over periods ranging from decades to millions of years. The earth is the only planet where life exists. The evolution of human life was only possible due to its favorable environmental conditions i.e. availability of water, oxygen and suitable temperature. Hence, the field of climate control requires special attention to control the rise in atmospheric temperature by controlling the emission of greenhouse gases. There is a need to conserve natural resources and look for some alternative to these resources. The book provides basic information and facts about climate change and hydrological effects, related to melting ice caps and glaciers, rise in sea level, rise in temperature and increasing number of disasters. It also discusses latest technologies applied and adopted to reduce the impact of these changes.