tailieunhanh - Pollution and Industrial Poultry Production in America

Research reports and experience of successful producers indicate that a high standard of bird care is a basic requirement if egg production is to achieve its full potential. High standards of bird care, however, have to encompass both the metabolic needs of a particular species and other factors that evidently contribute to the well-being of animals. The housing of laying hens in cages is currently the most widely accepted confinement system used by producers of table eggs in Canada. Although this system is receiving most of the criticism for failing to meet all the defined acceptable standards of animal welfare, it may provide more advantages. | PEW ENVIRONMENT GROUP CHICKEN Pollution and Industrial Poultry Production in America Cover photos from left David Harp Robert Bennett AGStock Images David Harp Chesapeake Bay Bridge Michael Lutzky The Washington Post Getty Images July 27 2011 Chicken once a distant third to beef and pork is now the most popular meat in the United States. The average American eats almost 84 pounds of chicken a year more than twice the amount eaten in 1970. The American poultry industry has matched this change in appetite with an exponential increase in production. In 2007 for instance billion chickens were raised and sold as food in the United States a jump of more than 1 400 percent since 1950. At the same time chicken farms have mushroomed in size by 2006 a typical operation produced an average of 605 000 birds in vast buildings of 20 000 square feet or more. Meanwhile the number of individual farms raising chickens for food has plummeted by 98 percent in just over half a century. This transformation of the industry has been accompanied by an environmental challenge In many cases these large poultry farms pose major pollution problems for regional communities. The Pew Environment Group s new report Big Chicken Pollution and Industrial Poultry Production in America describes how the industrialization and consolidation of the poultry business have concentrated production in what is now known as the Broiler Belt. In this area which extends from eastern Texas through the southeastern United States and north to Maryland and Delaware chickens outnumber people by as much as 400 to 1. The waste produced by these concentrated poultry operations raises serious concerns about treatment and disposal particularly along the shores of the largest estuary system in the United States the Chesapeake Bay. The 523 million chickens produced each year in just Maryland and Delaware generate roughly 42 million cubic feet of chicken waste enough to fill the dome of the . Capitol about 50 times or .

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