Air pollution


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Air pollution

  1. 1. AIR POLLUTION Presented By: Ashhadul Islam
  2. 2. Content • Introduction • Types of air pollution • Smog • Acid rain & effect • Green house & effect • Effect on ozone layer • Causes of air pollution • preventions
  3. 3. WHAT IS AIR POLLUTION?? • Air pollution is the introduction of chemicals, particulate matter, or biological materials that cause harm or discomfort to humans or other living organisms, or cause damage to the natural environment or built environment, into the atmosphere.
  4. 4. TYPES OF AIR POLLUTION • There are several types of air pollution, Mainly Indoor Air Pollution and Out Door Air Pollution. These include smog, acid rain, the green house effect and hole in the ozone layer. • One type of air pollution is the release of particles into the air. • Another type of pollution is the release of poisonous gases.
  5. 5. SMOG • Smog is a type of large scale outdoor pollution. It is caused by chemical reactions between pollutants derived from different sources.
  6. 6. ACID RAIN It is caused when a pollutant combines with droplets of water in the air. The effects of acid rain on the environment can be serious
  7. 7. EFFECTS OF ACID RAIN  Acid rain causes acidification of lakes and streams .  It contributes to the damage of trees and many sensitive forest soils.  It accelerates the decay of building materials paints, including irreplaceable buildings, statues, sculptures that are part of our nation's cultural heritage. and and
  8. 8. GREEN HOUSE EFFECT • It generally comes from the build up of carbon dioxide gas in the atmosphere. • Carbon dioxide is produced when fuels are burnt. • In this type of pollution sun rays go to the atmosphere and they are trapped by green houses gases. So the temperature on the earth raise.
  9. 9.  It is another result of air pollution.  Chemicals released by our activities affect the stratosphere.  Release of CFC from heating, aerosol cans , refrigerator equipments remove some of the ozone , causing “ HOLES” .
  10. 10. INDOOR AIR POLLUTION - It is more dangerous than the outdoor pollution, because we do everything in enclosed environments where air circulation may be restricted. SOURCES OF INDOOR AIR POLLUTION - TABACCO SMOKE - COOKING AND HEATING APPLIANCES - VAPORES FROM BUILDING MATERIALS
  11. 11. CAUSES OF AIR POLLUTION  Dust raised on the ground during dust storms.  Stone dust raised by crushing of stones in quarries.  Smoke emitted by vehicles.  Smoke from forest fires.
  12. 12.  Smoke raised by burning of coal in powerhouses.  Burning of wood, cow dung cakes, garbage etc.  Germs from coughing and sneezing.
  13. 13.  Some individuals are much more sensitive to pollutants than are others.  Air pollution can affect our health in many ways with both short term and long term effects.  Many different chemicals in the air affect the human body in negative ways. • Older people are highly vulnerable to diseases induced by air pollution. Those with heart or lung disorders are under additional risk • Children and infants are also at serious risk. • Air pollutants such as ozone, nitrogen oxides, and sulfur dioxide also have harmful effects on natural ecosystems. They can kill plants and trees by destroying their leaves, and can kill animals, especially fish in highly polluted rivers.
  14. 14. PREVENTIONS Below are a few efforts that you can make to help clean our air  Car Pool: Forming and implementing a car pool will reduce the number of cars, thereby, preventing air pollution by cutting down the use of fossil fuels. This way, it will help in the sustainable use of fossil fuel and its conservation for the future generations.  Vehicle Care: Timely servicing of the car helps to keep it in a good condition, and also minimizes fuel exhaust. Driving the car at an average speed and turning off in traffic are the thumb rules to save fuel. Make sure to use unleaded petrol and opt for regular pollution checking of your car.
  15. 15. • Public Transport: Whenever possible, try to travel by public transports. This helps in two ways; prevents air pollution and increases public income. If you are going to a nearby place, go by walking or use a bicycle, instead of using your vehicle. The objective is to minimize the use of fuels as far as possible. • Alternative Energy Sources: Another effective way to prevent air pollution is to use alternative energy sources such as solar energy, hydroelectric energy, and wind energy. Nowadays, sophisticated technologies such as wind turbine, solar water heaters are introduced to generate electricity and other energy forms for household uses. • Saving Energy: Saving energy will, of course, help to prevent air pollution. Switch off the lights, fans, air conditioners, televisions, and other appliances, when not in use. You can also share a room with others when the air conditioner or fan is on, instead of switching them on in every room.
  16. 16. • Minimize Air Pollution: Always try to minimize smoke emission, as it contributes a lot to air pollution. One way is to compost dried leaves and kitchen waste, instead of burning them. Composting will also give you organic fertilizer for your garden. Other tips include replacing old wood stoves or gas furnaces, avoiding solvents, and most importantly, do not smoke in the home. • Recyclable Materials: Recycling is a simple approach to reduce pollution in two ways; save energy which is required for disposing and minimize the pollutants released during manufacturing. The list of recyclable materials include plastic bottles, aluminum cans and utensils, paper, craft papers, cardboard and glass bottles. • Smart Purchasing: Remember to carry paper bags and minimize using plastic bags. While buying the products, always choose airfriendly and recyclable products that will minimize the emission of pollutants. Also, shop for only energy-efficient appliances that use less packaging.