Situs Acuan  - 
            
          
3.  
Researchers Discuss Health Implications of Meat Production and Consumption  
Johns Hopkins University
 Selengkapnya  Johns Hopkins University  
2.  
Clean Water & Factory Farms - Reports and Factsheets  
Sierraclub
 Selengkapnya  Sierraclub  
1.  
Animal Waste - What's the Problem?  
U.S. Environmental Protection Agency
 Selengkapnya  U.S. Environmental Protection Agency  
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