Download Controlling Earth's Pollutants (Environment at Risk) by Christine Petersen PDF

By Christine Petersen

In surroundings in danger medical ideas, ideas, and methodologies in environmental technology are explored and defined.

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Extra info for Controlling Earth's Pollutants (Environment at Risk)

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When 52 Water Worries You Are in a Watershed A watershed is all the land that drains into a particular basin, or low point in a landscape. The basin usually contains a body of water. Watersheds can be viewed at many scales. A single county may house many small watersheds, each draining a separate local wetland, stream, or pond. These are interconnected by the flow of water, forming larger watersheds. The Mississippi River watershed drains more than 40 percent of the United States! Watersheds can cross the political boundaries of cities, states, and even nations.

In 1848 he realized that cholera was transmitted through sanitary waste that polluted drinking water. Several years later Snow wrote of this problem: As soon as I became acquainted with the situation and extent of the late outbreak of cholera in Broadstreet, Golden Square, and the adjoining street, I suspected some contamination of the water. . On proceeding to the spot, I found that nearly all the 30 The Original Pollutants deaths had taken place within a short distance of the pump. . The pump-well in Broad Street is from 28 to 30 feet in depth, and the sewer, which passes a few yards from it, is 22 feet below the surface.

More and More Waste has given us intriguing information about ancient cultures. Similarly, future archaeologists will be able to learn about our way of life by studying our landfills. Their first impression may be that we had a real passion for stuff. According to the EPA, the United States has 1,654 landfills. This number has declined from a high of almost 8,000 in 1988. Since that time the trend has been to use fewer landfills but to make them much larger. In 2005 more than 54 percent of the nation’s trash went into landfills.

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