Pollution

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  Definition of pollution: Pollution is the introduction of contaminants into the natural environment that causes adverse change. Pollution can take the form of chemical substances or energy, such as noise, heat or light.  Pollutants, the components of pollution, can be either foreign substances/energies or naturally occurring contaminants.

  Forms of pollution: 

Air pollution: - release of chemicals and particulates into the atmosphere.

 Light pollution: - includes light trespass, over-illumination and astronomical interference.

 Littering: - the criminal throwing of inappropriate man-made objects, unremoved, onto public and private properties.

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Noise pollution: - which encompasses roadway noise, aircraft noise, industrial noise as well as high-intensity sonar.

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Soil contamination occurs when chemicals are released by spill or underground leakage.

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  Radioactive contamination , resulting from 20th century activities in atomic physics , such as nuclear power generation and nuclear weapons research, manufacture and deployment.

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  Thermal pollution, is a temperature change in natural water bodies caused by human influence, such as use of water as coolant in a power plant.

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  Visual pollution, which can refer to the presence of overhead power lines, motorway billboards, scarred landforms (as from strip mining), open storage of trash, municipal solid waste or space debris.

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  Water pollution, by the discharge of wastewater from commercial and industrial waste (intentionally or through spills) into surface waters; discharges of untreated domestic sewage, and chemical contaminants, such as chlorine, from treated sewage; release of waste and contaminants into surface runoff flowing to surface waters (including urban runoff and agricultural runoff, which may contain chemical fertilizers and pesticides); waste disposal and leaching into groundwater; eutrophication and littering.

  Effects to human health: Adverse air quality can kill many organisms including humans. Ozone pollution can cause respiratory disease , cardiovascular disease , throat inflammation, chest pain, and congestion . Water pollution causes approximately 14,000 deaths per day, mostly due to contamination of drinking water by untreated sewage in developing countries. Oil spills can cause skin irritations and rashes. Noise pollution induces hearing loss , high blood pressure , stress , and sleep disturbance . Mercury has been linked to developmental deficits in children and neurologic symptoms.

  Environment is related to our life all the time. More and more natural disaster happened, and people still destroy the earth.If we do not do something,we will lost our home one day.People should improve their aware of save earth and every single things can good for environment.