Air pollution
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This ppt. will give you overview of all the topics of air pollution... do leave comments about my ppt

This ppt. will give you overview of all the topics of air pollution... do leave comments about my ppt

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Air pollution Air pollution Presentation Transcript

  • CGC Technical Campus, Jhanjeri Presentation on environmental Pollution Presented by  Abhilasha Branch:- CSE  Akash sharma Section:- A+B  Akash grewal  Akshat  Akshay  Aman bhau  Presented to:-  Amit Dhanjal Ms.Shilpa  Amit kaushik (EVS lecturer)  Amandeep1
  • POLLUTION There are many kinds of pollution :- 1.Air pollution 2.Water pollution 3.Soil Pollution 4.Marine Pollution 5.Noise Pollution 6.Thermal pollution2
  • AIR POLLUTION3
  • Outline of Presentation:Air Pollution Definition Types Air Pollutants Sources of Air Pollutants Impacts of Air Pollution Air Pollution Control 4
  • Definition: The phenomena of presence of one or more contaminants in air due to natural phenomena or by human activities in such amount and duration that may adversely affect human, animals or plants life , property or comfort is called Air Pollution.5
  • Types Of Air Pollution:These are of 2 types:1- Indoor Air Pollution (inside home) :- Smoking, Stove, Insecticide, Cosmetics, Cleaning material, etc. 6
  • 2- Outdoor Air Pollution: Atmospheric Air Pollution Vehicles, Factories, Volcaniceruption etc. 7
  • Air Pollutants/ Contaminants:The substances which contaminate air are called air pollutants.Air Pollutants are categorized in Two broad Categories:(a) Primary:Primary pollutants are those released directly into the air. Such as CO, NO2, SO2 etc.(b) Secondary:Primary Pollutants are converted into other compounds in atmosphere due to chemical 8 reaction with each other or Photochemical
  • 9
  • Sources of Air Pollutants:There are Two main sources:-1- Natural Sources:Forest fires, volcanic eruptions, wind erosion, pollen dispersal, evaporation of organic compounds, and natural radioactivity. 10
  • 2- Human-made sources:Burning fuels (mobile or stationary), power plants , fertilizers , fumes from paint, hair spray, varnish and many cleaning products.11
  • Main Air Pollutants: There are several air pollutants, but Six of them are very common which are known as “ Criteria Pollutants” which are :-1) Carbon mono oxide (CO)2) Lead (Pb)3) Nitrogen di-oxide (NO2)4) Ozone (O3)5) Sulphur di-oxide (SO2)6) Particulate Matter12
  • Main Pollutants and their health Impacts:1- Carbon Monoxide: Colorless, odorless & toxic gas. Formed when carbon-containing fuel is not burned completely. Motor vehicles are the predominant source of carbon monoxide.Impacts: Decrease O2 carrying capacity of blood Weakens heart contraction Affects lungs and brain function13
  • 2- Lead (Pb): Highly toxic metal used in household products, Automobile fuel, Industrial chemicals. Airborne lead associated automobile exhaust.Impacts: Damage central nerves system. Damaging mental development of young children.14
  • 3- Ozone (O3): Ozone is a pungent-smelling, colorless gas. The highest ozone levels occur on hot summer afternoons.Impacts: Reduce lungs function. Weakens the immune system. Skin cancer. Destroy crops & forest. 15
  • 4- Sulphur Dioxide (SO2): Belongs to a family of gases called sulphur oxides (SOX). Roughly one-third of atmospheric sulfur compounds come from human-made sources. Of this one-third, only 5% of SO2 emissions come from mobile sources.Impacts: Respiratory and pulmonary difficulties; React with NOX and other chemicals cause acid rain.16
  • 5-Nitrogen Oxides (NOX): Comprise a family of highly reactive gases(NO2 ,NO and N2O). The burning of fossil fuels, produce NO and NO2. In the atmosphere, NO reacts to form NO2.Impacts: NO2 is a lung irritant, Cause of acid rain, Cause ground level ozone.17
  • 6- Particulate Matter (PM): PM either solid particles or liquid droplets. Measured in micrometers (µm).Impacts: Inhaled and lodged in the lungs and produce respiratory illness.18
  • Impacts of Air pollution on Environment  Acid Rain  Global warming and Green House effects  Ozone Layer Depletion  Smog19
  • ACID RAIN Acid rain is caused when the pollutants combine with water droplets in the air Acid rain increases acidity of Soil and Water ,thus affecting land , flora and fauna It corrodes buildings , monuments, bridges and railing etc. Buildings like Taj Mahal , British parliament , and20 many buildings and
  • Global Warming and Green House effect The increase in the temperature of atmosphere due to presence of CO2 is called “Green House Effect” If CO2 concentration is increased more Infra red radiations will the trapped leading to global rise in temperature called “global warming” Global warming has lead to21 melting of ice caps and
  • OZONE LAYER DEPLETION Chemicals released by our activities affect the stratosphere . The release of CFC’s from heating , aerosol cans , and refrigeration equipments leads to depletion of ozone layer Ozone layer protects us from the UV rays but due to depletion of ozone layer , exposure to U.V22 radiations has lead to many serious problems.
  • SMOG Smog is a type of large scale outdoor pollution . Smog is a combination of smoke and fog. It is of 2 types:- photochemical and coal induced smog Photochemical – is a mixture of pollutants which includes particulates , nitrogen oxides etc. Coal induced –formed by 23
  • SOLUTIONS Stationary Source Air PollutionPrevention Dispersion or CleanupBurn low-sulfur coal Disperse emissions above thermal inversion layer with tallRemove sulfur from smokestackscoal Remove pollutantsConvert coal to a after combustionliquid or gaseousfuelShift to less polluting Tax each unit ofenergy sources pollution produced Fig. 18-22, p. 491
  • SOLUTIONS Motor Vehicle Air PollutionPrevention CleanupUse mass transit Require emissionWalk or bike control devicesUse lesspolluting fuelsImprove fuel Inspect carefficiency exhaust systems twice a yearGet older, pollutingcars off the roadGive large tax write-offs or rebates forbuying low- Set strictpolluting, energy emissionefficient vehicles standards Fig. 18-23, p. 491
  • SOLUTIONS Air PollutionOutdoor IndoorImprove energy efficiency Reduce povertyto reduce fossil fuel useRely more on lower- Distribute cheap andpolluting natural gas efficient cookstoves or solar cookers to poorRely more on families in developingrenewable energy countries(especially solar cells,wind, and solar-produced hydrogen) Reduce or ban indoor smokingTransfer energyefficiency, renewable Develop simple andenergy, and pollution cheap tests for indoorprevention technologies pollutants such asto developing countries particulates, radon, and formaldehyde Fig. 18-26, p. 493
  • Thank You27