08-09-2012, 08:11 AM
iam a civil engineering student
i want a seminar topic about air pollution and its control
08-09-2012, 08:11 AM
iam a civil engineering student i want a seminar topic about air pollution and its control
08-09-2012, 10:44 AM
To get more information about the topic "air pollution and its control"
please visit the age https://seminarproject.net/Thread-modern...chnologies if you not get relevant information about air pollution and its control from there .. please reply here again with specific information request (with listing of sub titles and headings ) . so that we/generous users can help you on that
07-05-2013, 01:07 PM
Air pollution
Air pollution.ppt (Size: 1.1 MB / Downloads: 72) Definition: Air pollution is the human introduction into the atmosphere of chemicals, particulate matter, or biological materials that cause harm or discomfort to humans or other living organisms, or damages the environment. Sources of pollutants: : Sources of pollutants: ?The two main sources of pollutants in urban areas are: ?ransportation (predominantly automobiles). Motor vehicles produce high levels of carbon monoxides (CO) and are a major source of hydrocarbons (HC) and nitrogen oxides (NOx). Fuel combustion in stationary sources, including residential, commercial, and industrial heating and cooling and coal-burning power plants.Fuel combustion in stationary sources is the dominant source of sulfur dioxide (SO2). Pollutants and damage : Pollutants and damage ?Carbon dioxide(CO2) -s one of the major pollutants in the atmosphere. CO2 is a good transmitter of sunlight, but partially restricts infrared radiation going back from the earth into space. This produces the so-called greenhouse effect that prevents a drastic cooling of the Earth during the night. Increasing the amount of CO2 in the atmosphere reinforces this effect and is expected to result in a warming of the Earth's surface. Currently carbon dioxide is responsible for 57% of the global warming trend. Nitrogen oxides contribute most of the atmospheric contaminants. Global Warming : Global Warming ?For over the past 200 years, the anthropologic activities caused the concentrations of heat-trapping "greenhouse gases" to increase significantly in our atmosphere.These gases prevent heat from escaping to space, somewhat like the glass panels of a greenhouse Water Pollution : Water Pollution ?Definition:Water pollution is the contamination of water bodies such as lakes, rivers, oceans, and groundwater caused by human activities, which can be harmful to organisms and plants which live in these water bodies. Sources of pollution : Sources of pollution ?Seepage from a landfill ?Discharge of industrial waste into the soil ?Percolation of contaminated water into the soil ?Rupture of underground storage tanks ?Excess application of pesticides , herbicides or fertilizer ?Solid waste seepage Pollutants : Pollutants ?Petroleum hydrocarbons ?Heavy metals ?Pesticides Soil Pollution : Soil Pollution ?Definition-Soil pollution is defined as the build-up in soils of persistent toxic compounds, chemicals, salts, radioactive materials, or disease causing agents, which have harmful effects on plant growth and animal health. |
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