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Mankind threatens water crisis

March 21 2007

To date, very poor state of the world's largest rivers. Scientists say the water crisis.

This is due, primarily, with the construction of dams, pollution and climate change.
World Wildlife Fund (WWF) has published a list of ten rivers, which now threatens the greatest danger. First and foremost, this Asian Yangtze, Ganges, Mekong. The list also included the European Danube, the Rio Grande to the North American, African Nile.

One of the most malicious activity is considered construction of dams. Governments of many countries should think seriously about this issue. Of the 177 largest rivers of the world, only a third has no dams on its main channel. Only 21 water artery from the list is completely free of structures.

Construction of dams on rivers can cause a global catastrophe. Soon we will be able to face the fact that the river of the dam will affect not only on the river, but also on other natural objects and phenomena.

"The impact of Hurricane Katrina, New Orleans was a shining example of how the Mississippi River man took revenge for the violation of its ecosystems," - said James Pittock, Director of International Freshwater Programme WWF.

The fact that the dam detain silt, sand, all sorts of bottom sediments and thereby deplete the meadows and wetlands downstream. This was a major factor devastation.

If no action is taken, the threat to the lives of many organisms will be very substantial. Within 15 years every fourth river is a dam.

Scientists say that the state of the waterways largely depends on the future of our posterity. WWF believes that this problem did not concede on the importance of the issue of global warming. Tells Morning.

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