Water Is A Necessity For The Existence Of Human Beings

Water is a necessity for the existence of human beings and approximately 71 % of the earth is water and it exists in many different forms. Water is constantly moving from one place to the other and from one state to the other and this process is known as the water cycle. As water evaporates, vapors rise and condense into clouds. The clouds move over the land, and precipitation falls in the form of rain, ice or snow. The water fills streams and rivers, and eventually flows back into the oceans where evaporation starts the process anew. Although water continuously changes states, from solid to liquid to gas, the amount of water on Earth remains constant. There is as much water now as there were hundreds of millions of years ago (Project, 1995). The most considerable impacts humans make on the water cycle include urbanization, storage of water in reservoirs, groundwater mining, irrigation, pollution, combustion deforestation and wetlands. Urbanization Impervious surfaces associated with urbanization alter the natural amount of water that takes each route. Increased impervious cover associated with urbanization alters the natural cycling of water. Changes in the shape and size of urban streams, followed by decreased water quality, are the most visible effects of increased imperviousness. Greater frequency and severity of flooding, channel erosion, and destruction of aquatic habitat commonly follow watershed urbanization. Alterations in the aquatic environment associated withShow MoreRelatedCreation Myths Essay504 Words   |  3 PagesCreation Myths Who made who? Did God create humans or did humans create god? At first thought one would of course say God created humans. Man cannot create god! What fool would dare say such a thing! After all the definition of God says that it is the supreme being and the divine creator, not the divine creation. So of course God created man, right? 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