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picture1_Therapeutic Exercises Pdf 49580 | Ncert Solutions For Class 12 Biology Chapter 16 Environmental Issues


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File: Therapeutic Exercises Pdf 49580 | Ncert Solutions For Class 12 Biology Chapter 16 Environmental Issues
ncert biology chapter 16 environmental issues cbse ncert solutions for class 12 biology chapter 16 exercises q 1 what are the various constituents of domestic sewage discuss the effects of ...

icon picture PDF Filetype PDF | Posted on 31 Aug 2022 | 4 years ago

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...Ncert biology chapter environmental issues cbse solutions for class exercises q what are the various constituents of domestic sewage discuss effects discharge on a river solution include colloidal matter such as faecal detergent wastes bacteria and paper fibres suspended solid sand silt clay dissolved nutrients nitrate ammonia phosphate sodium calcium etc waste harbours numerous micro organisms which consume lot oxygen resulting in depletion water this increases bod biochemical demand presence toxic increased result death fishes other living further makes unsafe consumption by humans animals also contains large amounts organic promotes excessive growth phytoplankton or planktonic algae causing algal blooms body results degradation quality fish mortality is one most significant sources pathogenic microbes may cause outbreak borne diseases dysentery typhoid jaundice cholera initiatives were taken reducing vehicular air pollution delhi has improved following measures government to reduce ...
								

							

						
	
												
				
					
					
					
			
					
				
				
		
	

	
		





	

	
				

						

						
							
					 
							
						

						
						
						
				

														
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Posted on: 31 Aug 2022 | 4 years ago
										
										
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Filetype: PDF
										
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												Andy yahya