presentation on water pollution : presentation on water pollution by mian raham ghaffar b,es batch 1st
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Pollution.ppt - upload & share powerpoint presentations, Pollution.ppt presentation transcript. overview definition of pollution types of pollution air pollution: a. introduction c. effects b.. Powerpoint presentation, Title: powerpoint presentation author: pdb last modified by: reviewer created date: 3/27/2002 8:45:54 pm document presentation format: on-screen show. Ppt water pollution - youtube, This presentation is prepared by rupesh of agdav studying in class 8.