Sunday, December 5, 2010

Selection24: Restoring rivers.

When we talk about rivers in the united state, we also talk about how dirty and polluted they are. More than one third of rivers in the United States are impaired. As a result of this, water shortages are increasing; aquatic wildlife is going extinct at a high rate because of eutrophication. For instance, drinking water in Wisconsin was found to exceed the safe level of nitrate. Not to mention the dead zone created by high levels of nutrients and sediments from river tributaries in the Chesapeake bay.  River restoration, which is repairing waterways that can no longer perform essential ecological and social functions,  such as floods, providing clean drinking water, removing excessive nutrients and sediments levels before they get to coastal zones;  moreover, supporting wildlife. However, the nation can do much better.  Our rivers are destructed and ecologically dysfunctional because the majority of people live in coastal cities and water. At first, dilution came to be the solution for polluted by carrying away waste by streams and rivers. Riparian forests also were cut down to fill small tributaries and wetlands for transportation. What is making things worse is the increasing population and industry growth, the latter pump raw sewage and wastes into streams and rivers. Despite the efforts the government makes to solve these problems, rapid changes in land use and effects that urbanization and agriculture have had on water are not easy. Many attempts, though, have been made to minimize those effects specially in the department of agriculture

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