Predicting the Environmental Conditions of Megacities

the effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)

cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...

environmental effects of gol-e-gohar iron ore mine on groundwater of the area

gol-e-gohar iron ore mine of sirjan in southern part of iran is a large open pit that operates below the groundwater table and during mining operation, dewatering is required to prevent operation processes from flooding. current operation is going on by digging wells in or out of the pit and pumping to prevent flooding. as a result of the former dewatering operation a vast deep cone of depressi...

Social and Environmental Dimensions of Urban Health in Chinese Megacities

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The Emergence of Megacities

human history. The first cities were built on the plains of Mesopotamia near the Tigris and Euphrates rivers between the years 4000 and 3000 BC. The first city to reach a population of one million was Rome, in about 5 BC. Not until about 1800 AD had another city, London, reached the one million mark. Urban populations grew rapidly throughout the 19th century, fueled more by migration from rural...

The next age of megacities