Содержание
- 2. Ecology is a since which studies the relationship between all forms of life on our planet
- 3. Since ancient times Nature has served Man giving everything he needs: air to breathe, food to
- 4. Major current environmental issues Air pollution Radiation pollution Global warming Radioctive contamination Ozone layer Water pollution
- 5. Air pollution Air pollution is a community problem. Cars, trucks, busses, and airplanes are the worst
- 6. 5 Major Pollutants: 1..) Carbon Monoxide 2.) Sulfur Dioxide 3.) Nitrogen Dioxide 4.) Particulate Matter 5.)
- 7. Carbon Monoxide produced when carbon does not burn in fossil fuels present in car exhaust deprives
- 8. Nitrogen Dioxide reddish, brown gas produced when nitric oxide combines with oxygen in the atmosphere present
- 9. Atmospheric Pollution Is an unwanted change in the quality of earth's earths atmosphere caused by emission
- 10. Classification of Air Pollutents Natural Pollutants: The pollution which comes out from natural sources such as
- 11. Modern smog is a type of air pollution derived from vehicular emission from internal combustion engines
- 12. Photochemical smog: In 1952 London was covered by smog for 10 days .This smog was caused
- 15. Soil pollution is the contamination of soil with harmful substances that can adversely affect the quality
- 16. CAUSES OF SOIL POLLUTION… Use of chemical include – Pesticides, insecticides, fertilizers. Excessive use of these
- 17. Global Warming Global warming is the increase in the average temperature of Earth's near-surface air and
- 18. The Future effects of global warming 1. melting of the ice caps. This melting could increase
- 21. When coal and petroleum are burned, they release certain harmful gases into the air. These gases
- 23. 1. The Effects of Acid Rain When acid rain pollutes lakes and streams, it can kill
- 24. Radioactive contamination - the most dangerous form of physical pollution associated with human exposure to other
- 27. Effects On Human Beings . ► The impact of radioactive pollution on human beings can vary
- 28. Chernobyl disaster The most horrible ecological disaster befell Ukraine and its people after the Chernobyl tragedy
- 29. In all 150,000 square kilometres in Belarus, Russia and Ukraine were contaminated 7 million people living
- 30. Semipalatinsk Nuclear Test Site A greater threat to people's health, Semipalatinsk is a former nuclear test
- 31. A number of genetic defects and illnesses in the region, ranging from cancers to impotency to
- 32. Polluted waters of the Caspian Sea The Caspian Sea is in serious environmental danger. Iran has
- 33. Desertification: is the process by which land becomes desert Rainforests Over the World At one time
- 34. How have each of these factors contributed to desertification?
- 35. Drought: low rainfall since 1968. Soils become dry and there is no water left in wells.
- 36. Population is high and increasing fast. To increase food supplies more crops are grown and more
- 37. What are the effects of desertification? Food and water shortages lead to malnutrition, famine, disease and
- 38. Polluted waters of the Caspian Sea The Caspian Sea is in serious environmental danger. Iran has
- 48. Extinction Many animals are disappearing nowadays. People cut down trees and many animals lose their homes.
- 49. Causes of extinction. Habitat degradation- the main cause of habitat degradation world wide is agriculture with
- 50. What have been the environmental and economic effects of the shrinking sea? The Aral Sea was
- 52. Lake Chad is a historically large, shallow, endorheic lake in Africa, the size of which has
- 53. As you approach the Lake Chad basin from Maiduguri, in northeastern Nigeria, the atmosphere of despair
- 54. Ways of solving ecological problems Save trees….stop pollution The most important motto in a person’s life
- 55. Recycle waste materials……… Recycling involves processing used materials (waste) into new products to prevent waste of
- 56. To avoid air pollution…..Whenever possible, try to travel by public transports. This helps in two ways;
- 57. To avoid water pollution…….Rivers should not be used for washing clothes or bathing animal in. The
- 58. Look how beautiful our planet can be
- 60. Скачать презентацию