indoor and outdoor air pollution pp

Download Indoor and outdoor air pollution pp

Post on 14-Jun-2015




4 download

Embed Size (px)



2. Air supplies us with oxygen which isessential for our bodies to live.However, human activities can releasesubstances into the air, some of whichcan cause problems for humans,plants and animals. 3. Smog Acid rain The greenhouse effect Holes in the ozone layer.Each of these problems has seriousimplications for our health and well-being as well as for the wholeenvironment. 4. Is a type of large- scale outdoorpollution. It is caused by chemical reactionsbetween pollutants derived fromdifferentsources,primarilyautomobile exhaust and industrialemissions. Cities are often centers of these typesof activities, and many suffer from theeffects of smog, especially during thewarm months of the year. 5. For each city, the exact causes ofpollution may be differentDepending on: The geographical location Temperature Wind and weather factors Pollution is dispersed differently. However, sometimes this doesnt happen and the pollution can build up to dangerous levels. 6. When a pollutant, such as sulfuric acidcombines with droplets of water in theair, the water can become acidified.The effects of acid rain on theenvironment can be very serious. 7. It damages plants by destroying theirleaves It poisons the soil And it changes the chemistry of lakesand streams. Damage due to acid rain kill trees andharms animals, fish, and other wildlife 8. Is generally believed to come from thebuild up of carbon dioxide gas in theatmosphere.Carbondioxide isproduced when fuels are burned.Plants convert carbon dioxide back tooxygen, but the release of carbondioxide from human activities ishigher than the worlds plants canprocess. 9. The situation is made worse sincemany of the Earths forests are beingremoved, and plant life is beingdamaged by acid rain. Thus, theamount of carbon dioxide in the air iscontinuing to increase. This build-upacts like a blanket and traps heatclose to the surface of the Earth. 10. The ozone layer in the Stratosphereprotects the Earth from harmfulultraviolet radiation from the Sun.Release of CFC from aerosol cans,cooling systems and refrigeratorequipment removes some of theozone, causing holes allowing theradiation to reach the Earth. 11. It is the presence of physical,chemical orbiologicalcontaminants in the air of confinedenvironments, whichare notnaturally present in high quantitiesin the external air of the ecologicalsystems. 12. Many people spend large portion oftime indoors: Weeat workstudy sleepdrinkin enclosed environments, where aircirculation may be restricted. 13. Tobacco smoke Cooking and heating appliances Vapors from building materials Paints Furniture Varnishes Detergents Pesticides 14. Numerous chemicals are used insidehome. Many items inside our homes andmaterials used in home constructionare notorious for letting off poisonousgasses for years. 15. NASA studies show that having ampleplants indoors can detoxify up to 85percent of indoor air pollution. Theyact like a filter for the air. 16. Its also important to open thewindows and doors of your home,daily if possible, to allow fresh air tocirculate in. 17. Having plants inside adds oxygen tothe air youre breathing, and havingplants inside is even known todecrease the stress levels of theinhabitants. 18. Ultraviolet radiation is known to causeskin cancer and has damaging effectson plants and wild life. 19. Air pollution can affect our health inmany ways with both short-term andlong-term effects.Children and elderly people oftensuffer more from the effects of airpollution.People with health problems such asasthma, heart and lung disease mayalso suffer more when the air ispolluted. 20. Irritation to the eyes, nose and throat Upper respiratory infections such asbronchitis and pneumonia. Other symptoms canincludeheadaches,nauseaand allergicreactions. 21. Chronic respiratory disease Lung cancer Heart disease Even damage to the brain, nerves,liver or kidneys. Continual exposure to air pollutionaffects the lungs of growing childrenand may aggravate or complicatemedical conditions in the elderly.