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"ENVIRONMENTAL SCIENCE FOR CSS.......AUTHOR:IMRAN BASHIR(PMS)" 1 Environmental Pollution "ENVIRONMENTAL SCIENCE FOR CSS.......AUTHOR:IMRAN BASHIR(PMS)" 2 Introduction Derived from the Latin word polluere (to contaminate). Unfavorable alternation of our surrounding is called pollution. Smoke form the industries and automobiles, chemicals from factories, radioactive substances from nuclear plants, sewage of houses and discarded household articles are common pollutants. "ENVIRONMENTAL SCIENCE FOR CSS.......AUTHOR:IMRAN BASHIR(PMS)" 3 TYPES OF POLLUTANTS 1- According to Form of Persistency Primary pollutants persist in that form in which they are added to environment Secondary pollutants are formed by interaction among the primary pollutants "ENVIRONMENTAL SCIENCE FOR CSS.......AUTHOR:IMRAN BASHIR(PMS)" 5 2- According to Existence in Nature Quantitative pollutants Qualitative pollutants • Become pollutants when their concentration reaches beyond threshold level In the nature • Don’t occur in nature and are man-made. "ENVIRONMENTAL SCIENCE FOR CSS.......AUTHOR:IMRAN BASHIR(PMS)" 6 3- According to Nature of Disposal "ENVIRONMENTAL SCIENCE FOR CSS.......AUTHOR:IMRAN BASHIR(PMS)" 7 4- According to Origin GASEOUS POLLUTANTS: CO,NOx PARTICULATE POLLUTANTS: ARE SOMKE FUMES,DUST "ENVIRONMENTAL SCIENCE FOR CSS.......AUTHOR:IMRAN BASHIR(PMS)" 8 5- According to State of Matter Natural pollutants occur in nature Anthropogenic pollutants are caus ...
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