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Civilization has historically flourished around rivers and major waterways; Mesopotamia, the so-called cradle of civilization, was situated between the main rivers Tigris and Euphrates; the traditional society of the Egyptians depended completely upon the Nile. The early Indus Valley Civilization (c. 3300 BCE to 1300 BCE) developed alongside the Indus River and tributaries that flowed out of the Himalayas. Large metropolises like Rotterdam, London, Montreal, Paris, New York City, Buenos Aires, Shanghai, Tokyo, Chicago, and Hong Kong owe their success partially to their easy accessibility via water and the resultant expansion of commerce. Health, in people, the extent of an individual’s continuing bodily, emotional, mental, and social ability to deal with his or her environment. As the number of service sector jobs has risen in developed nations, increasingly more jobs have turn into sedentary, presenting a special array of health issues than those related to manufacturing and the pr...