Rivers of BAngladesh The rivers of Bangladesh mark both the physiography of the nation and the life of the people. About 700 in number‚ these rivers generally flow south. The larger rivers serve as the main source of water for cultivation and as the principal arteries of commercial transportation. Rivers also provide fish‚ an important source of protein. Flooding of the rivers during the monsoon season causes enormous hardship and hinders development‚ but fresh deposits of rich silt replenish the
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polluted by nobody else but human. So what are the causes and effects of water pollution? The causes of water pollution vary. However‚ we can sum them up in to two groups: One is direct causes and the other is indirect causes. The direct causes are what are dumped directly into water bodies‚ such as raw sewage‚ household waste or chemicals. In developing countries‚ an estimated 90% of waste water is discharged directly into river streams without treatment. Leaking septic tanks and other sources of sewage
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reduce pollution in the United States of America in 2017. Pollution is incredibly harmful to the environment‚ world‚ climate‚ and even space. Pollution damages our atmosphere which then creates acid rain and toxins in the air. The 2015 "State of the Air" report finds 52 percent of Americans live in counties with unhealthy levels of air pollution. Pollution starts with littering which can harm many things depending on where litter is. Bottles‚ plastic bags‚ even food waste harms the rivers‚ lakes
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Most water pollutants are eventually carried by rivers into the oceans. In some areas of the world the influence can be traced hundred miles from the mouth by studies using hydrology transport models. Advanced computer models such as SWMM or the DSSAM Model have been used in many locations worldwide to examine the fate of pollutants in aquatic systems. Indicator filter feeding species such as copepods have also been used to study pollutant fates in the New York Bight‚ for example. The highest toxin
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The causes of water pollution Water pollution comes from a myriad of sources‚ both natural and from human activity. The most destructive causes of water pollution are man made‚ however. The largest sources include: The burning of coal in power plants emits ash particulates that contain toxic metals like arsenic and lead. Coal and petroleum also contain sulfur compounds. Combustion generates sulfur dioxide‚ a toxic gas‚ and oxides of nitrogen. When emitted from exhaust stacks‚ these two compounds
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Pollution‚ contamination of Earth’s environment with materials that interfere with human health‚ the quality of life‚ or the natural functioning of ecosystems (living organisms and their physical surroundings). Although some environmental pollution is a result of natural causes such as volcanic eruptions‚ most is caused by human activities. Sidebars | SIDEBAR | Climate Change 2001:The Scientific Basis | The Intergovernmental Panel on Climate Change (IPCC) is an international group of scientists
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Sea Pollution The pollution of the ocean is rapidly becoming a crucial problem on Earth. The major causes of sea pollution are oil spills‚ toxic waste‚ and dumping of other harmful materials into the ocean. This pollution will directly affect the living organisms in the ocean and indirectly affect human’s health and resources. We‚ as humans‚ should learn more about these in order to have the knowledge on how to solve this problem effectively. Oil spill is perhaps the most publicly acknowledged
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Ocean Pollution “Over 80% of marine pollution comes from land-based activities” (WWF‚ May 4‚ 2006‚ p.1). The rest comes from ocean-based activities. Different types of pollution enter the ocean each year. The major pollutants are oil‚ toxic materials‚ and debris. These materials not only pollute the ocean‚ but they also affect the marine life. Before the 1970s there were no laws to prevent and stop people from dumping pollutants into the ocean. Since the early 1970s many laws and regulations
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Water pollution in China started with industrial development and has become more one of the most devastating environmental problems faced by the country today. From the chart‚ we can see that as the country’s GDP rises‚ the volume of wastewater discharge increases as well. This suggests that to achieve a rise in GDP‚ the environment has to be sacrificed. The reason for this is that wastewater treatment techniques and facilities have fallen far behind from the growth of industrial production and
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Marine Pollution Marine pollution has become a major global issue. It is now becoming a serious concern that the ocean will no longer be a safe place for marine life and humans. There is a growing concern that pollution causes serious problems nowadays particularly health problems. This essay will argue that marine pollution should be addressed immediately. Firstly‚ the causes and the effects will be discussed‚ and some solutions to hoe marine pollution can be reduced. To begin with‚ marine pollution
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