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Auswirkungen - Duerre
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by PBworks 15 years, 12 months ago
Die Verlust von Trinkwasser wird moeglicherweise einer der verheerendsten Folgen des Klimawandels sein. Das Abschmelzen von Gletschern wird in vielen Gebieten Trinkwasservorraete stark einschraenken. So etwa in peru, China, und auch in der Alpenregion. Zunehmende Duerre wird ausserdem Millionen von Menschen ihre Lebensgrundlage entziehen.
Droughts and increasing population are on a collision course
Auswirkungen auf Duerre und Feuer sind hier von der Union of Concerned Scientists beschrieben.
Water - a special report by Nature News.
Who owns our water? The Water Wars are expected to be more brutal than the energy wars. While much of the Middle East struggles have been about geopolitics, oil, religious & racial intolerance, underlying these struggles has been the control & access of the regions water resources.
Worldwide
U.S. Southeast
U.S. Southwest
U.S. Midwest
U.S. West Coast
Asia
Australia
Water and Fossil Fuels
Wounded Waters Clean Air Task Force, February 2004
A report on the hidden side of power plant pollution
"Power plants are widely recognized as major sources of air pollutants that damage human health and the environment. Less well recognized is the damage they cause to water, both as large users and polluters. These damages are the hidden dimension of power generation pollution. Lifting the veil off this problem is essential to both restoring and wisely using many of our nation’s waters. The electricity generation industry withdraws about 15 percent of the total freshwater flow in United States each year – more than half as much as the contents of Lake Erie, consumes nearly half as much freshwater as all U.S. commercial and residential users combined, and discharges hundreds of billions of gallons of heated and treated waters back into US water bodies each day."
"Tar sands plants typically use two to four barrels of water to extract a barrel of oil. Currently, the water consumption is enough to sustain a city of two million people every year. And after it's been through the process, the water is toxic with contaminants, so it cannot be released into the environment. Some of it is reused, but vast amounts of it are pumped into enormous settlement ponds to be retained as toxic waste.
These "ponds" are actually the largest bodies of water in the region--big enough to be seen from space--and some of the world's largest man-made ponds overall, with miles of surface area. It may take 200 years for the smallest particles to settle down to the bottom of this toxic brew, which also contains very high levels of heavy metals and other health-threatening elements.
According to a recent joint study by the University of Toronto and the University of Alberta, the projected expansion of the tar sands projects will kill the Athabasca River, the only abundant source of water in the area. "Projected bitumen extraction in the oil sands will require too much water to sustain the river and Athabasca Delta, especially with the effects of predicted climate warning," the study said. If that amount of water were used, they warned, it would threaten the water supply of two northern territories, 300,000 aboriginal people and Canada's largest watershed, the Mackenzie River Basin."
Dam Water - Unintended Consequence
A new study says sea level may rise faster than scientists currently project. That's because dams built in the 20th century have captured and stored a great deal of water on land. That has slowed the rate of sea level rise and masked the effect of expanding seawater and melting ice. The study suggests that ice has actually been melting faster than we've realized. Current estimates, of a foot or two of sea level rise by the end of the century, could be low by several feet.
Auswirkungen - Duerre
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