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Saturday, January 29, 2011

Polution maker?

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Don’t ever get angry if I coded we are actually the criminal for putting state of wildlife on the state extinction by creating much pollution to the ecosystem. There is lot of pollution that human created such as toxic pollution, and water pollution just to name a few have numerous impacts on ecosystem of the earth specially human activities such as oil mining, oil transporting, and chemical industry.

In this aspect, we would like to bring you an accident which has numerous impacts on ecosystem on the earth. Sure, everyone wouldn’t forget an accident about the largest oil spill in United States history (40 million litters) occurred when the Exxon Valdez super tanker struck Bligh Reef in Prince William Sound, Alaska in the early spring of 1989. The oil spread throughout the western portion of this 8,800 km2 coastal marine ecosystem before spreading to the Gulf of Alaska, Kodiak Island, and along the Kenai and Alaska Peninsulas. It covered rocky shorelines and beaches, and initially killed large numbers of birds, mammals, and marine invertebrates, including endangered and declining species.

According to the Exxon Valdez Oil Spill Trustee Council estimated 250,000 seabirds, 2,800 sea otters, 300 harbor seals, 250 bald eagles, up to 22 killer whales died along with billions of salmon and herring eggs. CBS News, 2011, /05/03/natiohttp://www.cbsnews.com/stories/2010nal/main6456927.shtml

The oil causes birds' feathers to mat and separate, causing the bird to lose its buoyancy and the ability to regulate body temperature. Contact with oil on their skin or face can cause skin and eye lesions. Internal exposure to oil can lead to ulcers, pneumonia, liver damage, and other life-threatening conditions. On the other hand, oil also affects the sea turtles. Sea turtles will feel burning in mucous membranes of the eyes and mouth, the chemical of the oil can irritation or inflammation of the skin, and they will suffer from gastrointestinal inflammation, ulcers, bleeding, and poor digestion. If you are interested in this topic you can refer this web site: http://www.nwf.org/Oil-Spill/Effects-on-Wildlife.aspx

How can this crude oil cause the death of marine life? According to National Library of Medicine, when crude oil is burned, either accidentally or as a spill control measure, it emits chemicals which contained carbon dioxide, carbon monoxide, lead, nitrogen oxides, particulate matter, polycyclic aromatic hydrocarbons, sulphur dioxide , and volatile organic compounds that harmful for human and wildlife. For example, carbon monoxide and lead from crude oil can damage the wildlife’s intestinal system whereas the sulphur dioxide can damage the animal eye just we have mentioned above (effect on sea turtles).Botkin& Keller, 2003. These chemical can bring death to these animal. For more information you can refer to http://toxtown.nlm.nih.gov/text_version/chemicals.php?id=73

This is just one example out of million maybe billion example of pollution that mankind had made to this earth. As a human, let us take time to think deeply. And consider our actions that have numerous impacts on the ecosystem of the earth…




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