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The world is undergoing unprecedented intensification of agriculture to meet increasing demands of population growth and rapid shift to more protein and fat intensive diets driven by rising incomes in the developing world. Diet change has sparked a livestock revolution which has seen the number of food animals in the world double in the last 20 years and is forecast to double again as population moves from 6.8 to over 9 billion people by 2050. The livestock revolution accounts for over 21 billion food animals produced/year under what F.A.O. has termed the long shadow of intensification, including environmental damage and …