Air pollution

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Air pollution

  1. 1. MADE BY MIHIR CLASS –X E
  2. 2. An atmosphere is a layer of gases thatmay surround a material body ofsufficient mass, and that is held in placeby the gravity of the body. Anatmosphere may be retained for a longerduration, if the gravity is high and theatmospheres temperature is low. Someplanets consist mainly of various gases,but only their outer layer is theiratmosphere.
  3. 3. Air pollution is the introduction ofChemicals, particulate matter, orbiological materials that causeharm or discomfort to humans orother living organisms, or causedamage to the naturalenvironment or built environment,into the atmosphere.
  4. 4.  Sources of air pollution refer to the various locations, activities or factors which are responsible for the releasing of pollutants into the atmosphere. Smoke and carbon monoxide from wildfires volcanic activity, which produce sulfur, chlorine, and ash particulates "Mobile Sources" include motor vehicles, marine vessels, aircraft and the effect of sound etc. There are many other causes of air pollution. When you look at air pollution, people cause much more than they believe. In fact, the numbers for individual families is staggering. For example, the average family in the United States contributes to ozone causing pollution in the range of 325 pounds per year.
  5. 5.  Factories automobiles Energy sources Wild fires Volcano tornadoes
  6. 6. SMOGSmog is a type of large-scaleoutdoor pollution. It is caused bychemical reactions betweenpollutants derived from differentsources.Cities are often centers of thesetypes of activities.
  7. 7. It’s more dangerous thanthe outdoor pollution,because we do everything inenclosed environments whereair circulation may berestricted.There are many sources ofindoor air pollution: smoke,cooking and heatingappliances, and vapors frombuilding materials.
  8. 8. The health effects caused by air pollution mayinclude difficulty in breathing, wheezing, coughingand aggravation of existing respiratory and cardiacconditions. These effects can result in increasedmedication use, increased doctor or emergencyroom visits, more hospital admissions and prematuredeath. The human health effects of poor airquality are far reaching, but principally affect thebodys respiratory system and the cardiovascularsystem. Individual reactions to air pollutantsdepend on the type of pollutant a person is exposedto, the degree of exposure, the individuals healthstatus and genetics.
  9. 9. There are several effects of airpollution on the environmentwhich are varied and profound. 1.Global Warming 2.Depletion of the ozone layer. 3.Greenhouse effect
  10. 10. Global warming refers to the rising averagetemperature of Earths atmosphere andoceans and its projected continuation. Inthe last 100 years, Earths average surfacetemperature increased by about 0.8 °C(1.4 °F) with about two thirds of theincrease occurring over just the last threedecades. Warming of the climate system isunequivocal, and scientists are more than90% certain most of it is caused byincreasing concentrations of greenhouseproduced by human activities such asdeforestation and burning fossil fuel. Thesefindings are recognized by the nationalscience academies of all the majorindustrialized countries.
  11. 11. It is another result ofpollution. Chemicalsreleased by ouractivities affect thestratosphere. Releases of CFC fromheating, aerosol cans,refrigerator equipmentremoves some of theozone, causing "holes”.
  12. 12. It generally comes fromthe build up of carbondioxide gas in theatmosphere. Carbondioxide is producedwhen fuels are burned.In this type of pollutionsun rays go into theatmosphere and theyare trapped bygreenhouse-gasses. Sothe temperature on the
  13. 13.  switch from coal to cleaner fuels - use natural gas reduce energy use, improve energy efficiency burn less coal, use lower sulfur coals. Coal gasification source removal: No smoking source modification: more efficient stove design pollutant removal: filters Do not burn leaves in your garden, put them in a compost pit. Make sure that the pollution check for your family car is done at regular intervals. Stay indoors as much as you can during days when pollution levels are high. If you must go outside, limit outside activity to the early morning hours or wait until after sunset

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