The National Geographic Magazine, Volume 201National Geographic Society., 2002 - Geography |
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Page 22
... animals . Our fish , cattle , and broiler and laying chickens are raised in giant " factory " farms , which house large numbers of animals in tight quarters . Griffin and others at the CDC worry that the conditions in these concentrated ...
... animals . Our fish , cattle , and broiler and laying chickens are raised in giant " factory " farms , which house large numbers of animals in tight quarters . Griffin and others at the CDC worry that the conditions in these concentrated ...
Page 23
... animal by - products in livestock feed surfaced in the outbreak of mad cow disease , or bovine spon- giform encephalopathy ( BSE ) . The rapid spread of the illness , which likely resulted from feeding cattle meat and bonemeal from animals ...
... animal by - products in livestock feed surfaced in the outbreak of mad cow disease , or bovine spon- giform encephalopathy ( BSE ) . The rapid spread of the illness , which likely resulted from feeding cattle meat and bonemeal from animals ...
Page 30
... animal feed for more than half a century , after it was discovered that the drugs were effective in accelerating the growth of animals . Now by some estimates the volume of antibiotics used in animal feed equals or exceeds that used in ...
... animal feed for more than half a century , after it was discovered that the drugs were effective in accelerating the growth of animals . Now by some estimates the volume of antibiotics used in animal feed equals or exceeds that used in ...
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