Water pollution is caused by the discharge of harmful substances into rivers, lakes and seas. The increasing human population has led to an increase in pollution. Some of this is due to:. Nitrate fertilisers are very soluble in water.
UK inland water quality and pollution statistics, charts, and graphs:
Many people point to renewable energy as the greatest threat facing fossil fuel power plants. New WRI research finds that the real threat may be water. The U. Green Tariff Deals graph explores the renewable contracts signed by large-scale energy buyers and monopoly utilities via green tariffs. The top 10 emitters produce around 70 percent of global emissions in , based on historical emissions data from CAIT Climate Data Explorer.
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The problem of water pollution can be found throughout China, mainly due to agricultural and domestic waste products resulting from urbanization. Indeed, since the late s, China has been experiencing a period of economic reform and expansion accompanied by widespread urbanization. The ranking is organized in order of increasing pollution levels based on the concentrations of 30 substances : from Grade I to Grade V, indicating good, fairly good, slightly polluted, poor, and hazardous. There is also a category for the worst water, which is unsuitable for any use.