Factory farming

From Wikipedia, the free encyclopedia

Interior of a hog confinement barn or piggery
Interior of a hog confinement barn or piggery

Factory farming is the practice of raising farm animals in confinement at high stocking density, sometimes used more generally to describe operating a farm as a factory, as is typical in industrial farming by agribusiness.[1][2][3][4][5]

Confinement at high stocking density is one part of a systematic effort to produce the highest output at the lowest cost by relying on economies of scale, modern machinery, biotechnology, and global trade. Confinement at high stocking density requires antibiotics and pesticides to mitigate the spread of disease exacerbated by these crowded living conditions.[6] There are differences in the way factory farming techniques are practiced around the world.

There is a continuing debate over the benefits and risks of factory farming. The issues include the efficiency of food production; animal welfare; whether it is essential to feed the growing global human population; the environmental impact and the health risks. Gerhard Schroeder, then German Chancellor, called for a re-think of factory farming methods in 2000 in response to Europe's BSE crisis (which while not caused by confinement at high stocking density, is caused by unnatural feed supplied to farm animals for the purpose of lower costs),[4][7][8] and the risks to human health continue to be a concern to scientists.[9]

The UN and OIE estimate that in coming decades there will be billions of additional consumers in developing countries eating meat factory farmed in developing countries, but currently only about 40 out of the around 200 countries in the world have the capacity to adequately respond to a health crisis originating from animal disease (such as mad cow, avian flu, West Nile virus, bluetongue, and foot and mouth disease). Globalization turns this into an international problem and widespread use of antibiotics increases the chance of a pandemic resistant to known measures. Decreased genetic diversity increases the chance of a food crisis. "The World Bank, the U.N. and the World Organization for Animal Health or OIE are all working together on several levels regarding food safety, veterinarian services, packing and transportation."[10]

A commercial chicken house raising "broiler" pullets for meat
A commercial chicken house raising "broiler" pullets for meat

Contents

[edit] Terminology

Agriculture
General
Agribusiness · Agriculture

Agricultural science · Agronomy
Animal husbandry
Extensive farming
Factory farming · Free range
Industrial agriculture
Intensive farming
Organic farming · Permaculture
Sustainable agriculture
Urban agriculture

History
History of agriculture

Neolithic Revolution
Muslim Agricultural Revolution
British Agricultural Revolution
Green Revolution

Particular
Aquaculture · Christmas trees · Dairy farming

Grazing · Hydroponics · IMTA
Intensive pig farming · Lumber
Maize · Orchard
Poultry farming · Ranching · Rice
Sheep husbandry · Soybean
System of Rice Intensification
Wheat

Categories
Agriculture by country

Agriculture companies
Agriculture companies, U.S.
Biotechnology
Farming history
Livestock
Meat processing
Poultry farming

Factory farming

The Oxford English Dictionary attributes the first recorded use of "factory farming" to an American journal of economics in 1890.[11] It is now used widely by mainstream news organizations, including the BBC, The Washington Post, and CNN. A 1998 documentary, A Cow at My Table, shows the term is also used within the agricultural industry, although it is regarded by sections of the industry as a term used by activists.[12] The Encyclopaedia Britannica writes that the term is "descriptive of standard farming practice in the U.S." and frequently used by animal rights activists.[13] Webster's New Millennium defines it as "a system of large-scale industrialized and intensive agriculture that is focused on profit with animals kept indoors and restricted in mobility."[14]

Animal Feeding Operation (AFO)

"An animal feeding operation is defined by the United States Environmental Protection Agency as a lot or facility where animals are kept 45 days of the year or more [and] structures or animal traffic prevents vegetative growth. Note that this is different from a EPA's definition of a confined animal feeding operation which is an animal feeding operation larger than a given size."[15]

Confined Animal Feeding Operations

In the U.S., some factory farms are also known as Confined Animal Feeding Operations (CAFOs),[16] concentrated animal feeding operations,[17][18] or intensive livestock operations (ILOs).[19] "A confined animal feeding operation means a lot or facility, together with any associated treatment works, where both of the following conditions are met. One, animals have been, are, or will be stabled or confined and fed or maintained for a total of 45 days or more in any 12-month period. And two, crops, vegetation, forage growth, or post-harvest residues are not sustained over any portion of the operation lot or facility." The definition is used as part of waste management and environmental protection laws to deal with the concentrated pollution from large quantities of animal waste.[20][21].

Confinement

CAFOs and factory farms can be mostly indoors or mostly outdoors operations. The "confinement at high stocking density" aspect refers to lack of natural vegetation that the animals can eat and that can naturally process the resulting animal waste. High stocking density destroys the vegetation and produces unacceptable pollution from the animal waste in run-off and ground water unless it is handled appropriately, so laws have been enacted to deal with that; thus the legal definition for the term CAFO. Caged for life in pens too small to be humane is a completely separate issue from what "confined" refers to when used to define "factory farms" and "CAFO"s.

[edit] History

Agriculture adopted more intensive methods during the 18th century, with this growth in production best characterised by the Agricultural Revolution, where improvements in farming techniques allowed for significantly improved yields, and supported the urbanisation of the population during the Industrial Revolution.

Innovations in agriculture beginning in the late 19th century paralleled developments in mass production in other industries. The identification of nitrogen and phosphorus as critical factors in plant growth led to the manufacture of synthetic fertilizers, making possible more intensive types of agriculture. The discovery of vitamins and their role in animal nutrition, in the first two decades of the 20th century, led to vitamin supplements, which in the 1920s allowed certain livestock to be raised indoors.[citation needed] The discovery of antibiotics and vaccines facilitated raising livestock in larger numbers by reducing disease. Chemicals developed for use in World War II gave rise to synthetic pesticides. Developments in shipping networks and technology have made long-distance distribution of agricultural produce feasible.

According to the BBC, factory farming in Britain began in 1947 when a new Agriculture Act granted subsidies to farmers to encourage greater output by introducing new technology, in order to reduce Britain's reliance on imported meat. The United Nations writes that intensification of animal production was seen as a way of providing food security.[22] The agriculture correspondent of The Guardian wrote in 1964:

Factory farming, whether we like it or not, has come to stay. The tide will not be held back, either by the humanitarian outcry of well meaning but sometimes misguided animal lovers, by the threat implicit to traditional farming methods, or by the sentimental approach to a rural way of life. In a year which has been as uneventful on the husbandry side as it has been significant in economic and political developments touching the future of food procurement, the more far-seeing would name the growth of intensive farming as the major development.[23]

[edit] Nature of the practice

[edit] Scale

Warehouses in which chickens are confined in a factory farm.
Warehouses in which chickens are confined in a factory farm.

Agricultural production across the world doubled four times between 1820 and 1975[24] to feed a global population of one billion human beings in 1800 and 6.5 billion in 2002.[25]

During the same period, the number of people involved in farming dropped as the process became more automated. In the 1930s, 24 percent of the American population worked in agriculture compared to 1.5 percent in 2002; in 1940, each farm worker supplied 11 consumers, whereas in 2002, each worker supplied 90 consumers.[25]

The number of farms has also decreased, and their ownership is more concentrated. In the U.S., four companies produce 81 percent of cows, 73 percent of sheep, 57 percent of pigs and 50 percent of chickens.[26] In 1967, there were one million pig farms in America; as of 2002, there were 114,000,[27] with 80 million pigs (out of 95 million) killed each year on factory farms as of 2002, according to the U.S. National Pork Producers Council.[25] According to the Worldwatch Institute, 74 percent of the world's poultry, 43 percent of beef, and 68 percent of eggs are produced this way.[17]

Although Europe has become increasingly sceptical of factory farming, after a series of diseases such as BSE (mad cow) and foot and mouth disease affected its agricultural industries, globally there are indications that the industrialized production of farm animals is set to increase. According to Denis Avery of the Hudson Institute, Asia increased its consumption of pork by 18 million tons in the 1990s.[28] As of 1997, the world had a stock of 900 million pigs, which Avery predicts will rise to 2.5 billion pigs by 2050.[28] He told the College of Natural Resources at the University of California, Berkeley that three billion pigs will thereafter be needed annually to meet demand.[29]

[edit] Distinctive characteristics

Cows in a factory farm in the U.S.
Cows in a factory farm in the U.S.

Factory farms hold large numbers of animals, typically cows, pigs, turkeys, or chickens, often indoors, typically at high densities. The aim of the operation is to produce as much meat, eggs, or milk at the lowest possible cost. Food is supplied in place, and a wide variety of artificial methods are employed to maintain animal health and improve production, such as the use of antimicrobial agents, vitamin supplements, and growth hormones. Physical restraints are used to control movement or actions regarded as undesirable. Breeding programs are used to produce animals more suited to the confined conditions and able to provide a consistent "product".[citation needed]

The distinctive characteristic of factory farms is the intense concentration of livestock. At one farm (Farm 2105) run by Carrolls Foods of North Carolina, the second-largest pig producer in the U.S., twenty pigs are kept per pen and each confinement building or "hog parlor" holds 25 pens.[30] As of 2002, the company kills one million pigs every 12 days.[31] Carrolls, which is owned by Smithfield Foods, switched to total confinement in 1974. The company's chief executive officer, F.J. "Sonny" Faison, has said: "It's all a supply-and-demand price question … The meat business in this country is just about perfect, uncontrolled supply-and-demand free enterprise. And it continues to get more and more sophisticated, based on science. Only the least-cost producer survives in agriculture."[32] The animals are better off in total confinement, according to Faison:

They're in state-of-the-art confinement facilities. The conditions that we keep these animals in are much more humane than when they were out in the field. Today they're in housing that is environmentally controlled in many respects. And the feed is right there for them all the time, and water, fresh water. They're looked after in some of the best conditions, because the healthier and [more] content that animal, the better it grows. So we're very interested in their well-being—up to an extent.[31]

[edit] Key issues

[edit] The environment

The entrance to a dairy barn
The entrance to a dairy barn

One of the most obvious environmental problems that arises out of high density farming is that animals produce significant amounts of waste that need to be disposed of, both within the housing and then also from the factory site. Whilst in low density outdoor farming this can be coped with by stock and crop rotation, intensive techniques, especially on the industrial scale of a factory farm, have the potential to create significant environmental hazards.

The designation "confined animal feeding operation" in the U.S. resulted from that country's 1972 Federal Clean Water Act, which was enacted to protect and restore lakes and rivers to a "fishable, swimmable" quality. The United States Environmental Protection Agency (EPA) identified certain animal feeding operations, along with many other types of industry, as point source polluters of groundwater. These operations were designated as CAFOs and subject to special anti-pollution regulation.[33]

In 24 states in the U.S., isolated cases of groundwater contamination have been linked to CAFOs.[citation needed] For example, the ten million hogs in North Carolina generate 19 million tons of waste per year.[citation needed] The U.S. federal government acknowledges the waste disposal issue and requires that animal waste be stored in lagoons. These lagoons can be as large as 7.5 acres. Lagoons must be protected with an impermeable liner, but can nonetheless leak waste into groundwater under some conditions, and run-off from manure spread back onto fields as fertilizer can leak into surface water in the case of an unforeseen heavy rainfall. A lagoon that burst in 1995 released 25 million gallons of nitrous sludge in North Carolina's New River. The spill allegedly killed eight to ten million fish.[34]

Dennis Avery of the Hudson Institute's agricultural think-tank, the Center for Global Food Issues, has called modern farming a "conservation triumph," because it involves getting higher yields of crops and livestock from land.[35] He predicts that, after 2050, three billion pigs will be needed annually to meet demand:[29] "For the sake of the environment," he writes, "we had better hope those hogs are raised in big, efficient confinement systems."[28]

The use of controlled indoor environments means that animals unsuited to the local climate can be farmed. As an example, the UK has one of the few climates well suited to the outdoor farming of pigs.[36]

A 2006 FAO report says that the livestock sector of the world's economy that provides "one-third of humanity's protein intake" is one of the top three contributor's to the world's most serious environmental problems and that major reductions in impact could be achieved at reasonable cost through decentralization and intensification regulatory measures that reduce greenhouse gas emissions, improve livestock diets, improve animal waste management, and decrease land degradation.[37]

[edit] Ethics

Breeding sows in gestation crates
Breeding sows in gestation crates

The large concentration of animals, animal waste, and the potential for dead animals in a small space poses ethical issues. It is recognised that some techniques used to sustain intensive agriculture can be cruel to animals.[38] As awareness of the problems of intensive techniques has grown, there have been some efforts by governments and industry to remove inappropriate techniques.

In the UK, the Farm Animal Welfare Council was set up by the government to act as an independent advisor on animal welfare in 1979.[39] and expresses its policy as five freedoms: from hunger & thirst; from discomfort; from pain, injury or disease; to express normal behaviour; from fear and distress.

There are differences around the world as to which practices are accepted and there continue to be changes in regulations with animal welfare being a strong driver for increased regulation. For example, the EU is bringing in further regulation to set maximum stocking densities for meat chickens by 2010, where the UK Animal Welfare Minister commented, "The welfare of meat chickens is a major concern to people throughout the European Union. This agreement sends a strong message to the rest of the world that we care about animal welfare.”[40]

However, given the assumption that intensive farming techniques are a necessity, it is recognized that some apparently cruel techniques are better than the alternative. For example, in the UK, de-beaking of chickens is deprecated, but it is recognized that it is a method of last resort, seen as better than allowing vicious fighting and ultimately cannibalism.[38] Between 60 and 70 percent[41] of six million breeding sows in the U.S. are confined during pregnancy, and for most of their adult lives, in 2 ft by 7 ft gestation crates.[42][3] According to pork producers and many veterinarians, sows will fight if housed in pens. The largest pork producer in the U.S. said in January 2007 that it will phase out gestation crates by 2017.[3] They are being phased out in the European Union, with a ban effective in 2013 after the fourth week of pregnancy.[43] With the evolution of factory farming, there has been a growing awareness of the issues amongst the wider public, not least due to the efforts of animal rights and welfare campaigners.[44] As a result gestation crates, one of the more contentious practices, are the subject of laws in the U.S.[45], Europe[46] and around the world to phase out their use as a result of pressure to adopt less confined practices.

[edit] Health problems and nuisance

According to the U.S. Centers for Disease Control and Prevention (CDC), farms on which animals are intensively reared can cause adverse health reactions in farm workers. Workers may develop acute and chronic lung disease, musculoskeletal injuries, and may catch infections that transmit from animals to human beings.

Pesticides are used to control organisms which are considered harmful[47] and they save farmers money by preventing product losses to pests.[48] In the US, about a quarter of pesticides used are used in houses, yards, parks, golf courses, and swimming pools[49] and about 70% are used in agriculture.[48] However, pesticides can make their way into consumers' bodies which can cause health problems. One source of this is bioaccumulation in animals raised on factory farms.[50][49][51]

The CDC writes that chemical, bacterial, and viral compounds from animal waste may travel in the soil and water. Residents near such farms report nuisances such as unpleasant smell, flies and adverse health effects.[18]

The CDC has identified a number of pollutants associated with the discharge of animal waste into rivers and lakes, and into the air. The use of antibiotics may create antibiotic-resistant pathogens; parasites, bacteria, and viruses may be spread; ammonia, nitrogen, and phosphorus can reduce oxygen in surface waters and contaminate drinking water; pesticides and hormones may cause hormone-related changes in fish; animal feed and feathers may stunt the growth of desirable plants in surface waters and provide nutrients to disease-causing micro-organisms; trace elements such as arsenic and copper, which are harmful to human health, may contaminate surface waters.[18]

In the European Union, growth hormones are banned on the basis that there is no way of determining a safe level. The UK has stated that in the event of the EU raising the ban at some future date, to comply with a precautionary approach, it would only consider the introduction of specific hormones, proven on a case by case basis.[52] The various techniques of factory farming have been associated with a number of European incidents where public health has been threatened or large numbers of animals have had to be slaughtered to deal with disease. Where disease breaks out, it may spread more quickly, not only due to the concentrations of animals, but because modern approaches tend to distribute animals more widely.[citation needed]. The international trade in animal products increases the risk of global transmission of virulent diseases such as swine fever[53], BSE, foot and mouth and bird flu.

[edit] Aspects of factory farming

  • Low cost — Intensive agriculture tends to produce food that can be sold at lower cost to consumers. This is achieved by reducing land costs and management costs.
  • Quality — Factory farming methods permit increased standardization and control over product output.
  • Efficiency — Animals in confinement can be supervised more closely than free-ranging animals, and diseased animals can be treated faster. Further, more efficient production of meat, milk, or eggs results in a need for fewer animals to be raised, thereby limiting the impact of agriculture on the environment.
  • Economic contribution — The high input costs of agricultural operations result in a large influx and distribution of capital to a rural area from distant buyers rather than simply recirculating existing capital. A single dairy cow contributes over $1300 US to a local rural economy each year, each beef cow over $800, meat turkey $14, and so on. As Pennsylvania Secretary of Agriculture Dennis Wolff states, “Research estimates that the annual economic impact per cow is $13,737. In addition, each $1 million increase in PA milk sales creates 23 new jobs. This tells us that dairy farms are good for Pennsylvania's economy.” [54]
  • Food safety — Reducing number and diversity of agricultural production facilities results in easier management. Smaller facility numbers permit easier government oversight and regulation of food quality. Processing foodstuffs through centralized mediums leads to standardization, which protects general food safety, removing unsafe rogue elements. There is dispute over food safety. It is noted that E. coli grows naturally in most mammals, including humans, and that only a few strains of E. coli are potentially hazardous to humans. They also note that diseases naturally occur among chickens and other animals. Properly cooking food can effectively remove risk factors by killing bacteria.
  • Animal health — Larger farms have greater resources and abilities to maintain a high level of animal health. Larger farms employ more expert employees who devote all their working hours to farm work, rather than employing underskilled part-time workers as is common on smaller operations. Larger farms are more able to make use of expert veterinarians and the resources of state and federal agricultural extension services. Industrial agriculture generally provides more mechanisms for the use of antibiotics to prevent and treat diseases than non-industrial agriculture.
  • Diseases The use of intensive farming are thought to make it more likely to evolve harmful diseases. Techniques used in factory farming, such as the need for cheap, artificial foodstuffs have been credited with leading to a higher incidence of Bovine spongiform encephalopathy, also known as mad cow disease, which in turn is claimed to cause Creutzfeldt-Jakob disease in humans. Overpopulation may facilitate the spread of disease. Many communicable diseases spread rapidly under such conditions. Animals raised on antibiotics may develop antibiotic resistant strains of pathogenic bacteria ("superbugs").[55] Use of animal vaccines can create new viruses that kill people and cause flu pandemic threats. H5N1 is an example of where this might have already occurred.[56][57][58]
  • Pollution — Large quantities and concentrations of waste are produced.[59] Lakes, rivers, and groundwater are at risk when animal waste is improperly recycled. Pollutant gases are also emitted. Concentrations of animals can produce unacceptable levels of foul smells as opposed to the tolerable odours of the countryside. In less intensive conditions, natural processes can break down potential pollutants. Large farms can maintain and operate sophisticated systems to control waste products. Smaller farms are unable to maintain the same standards of pollution control. By consolidating waste products, farmers can efficiently manage waste.
  • EthicsCruelty to animals: Crowding, drugging, and performing surgery on animals. On some farms, chicks may be debeaked when very young. Confining hens and pigs in barren environments leads to physical problems such as osteoporosis and joint pain, and also boredom and frustration, as shown by repetitive or self-destructive actions known as stereotypes.[60]. Animal treatment is subject to welfare legislation, though there is not consensus on what is acceptable. Some harmful treatments, such as debeaking, are tolerated on the basis that the alternative is greater harm to the animals.
  • Destruction of biodiversity — A tendency towards using single adapted breeds (a mono-culture) in factory farming, both in arable and animal farming, gives uniform product designed for high yields, at the risk of increased susceptibility to disease. The loss of locally adapted breeds reduces the resilience of the agricultural system. The issue is not limited to factory farming and historically the problem is reflected in the rapid adoption of one or two strains of crops across a wide area as seen in the Irish potato famine of 1854 and the Bengal rice famine in 1942.[61] The loss of the gene pool of domesticated animals limits the ability to adapt to future problems. This issue exists in all types of farming practices.

[edit] See also

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[edit] Notes

  1. ^ Sources discussing "intensive farming", "intensive agriculture" or "factory farming":
    • Fraser, David. Animal welfare and the intensification of animal production: An alternative interpretation, Food and Agriculture Organization of the United Nations, 2005.
    • Turner, Jacky. "History of factory farming", United Nations: "Fifty years ago in Europe, intensification of animal production was seen as the road to national food security and a better diet ... The intensive systems - called 'factory farms' - were characterised by confinement of the animals at high stocking density, often in barren and unnatural conditions."
    • Simpson, John. Why the organic revolution had to happen, The Observer, April 21, 2001: "Nor is a return to 'primitive' farming practices the only alternative to factory farming and highly intensive agriculture."
    • Baker, Stanley. "Factory farms — the only answer to our growing appetite?, The Guardian, December 29, 1964: "Factory farming, whether we like it or not, has come to stay ... In a year which has been as uneventful on the husbandry side as it has been significant in economic and political developments touching the future of food procurement, the more far-seeing would name the growth of intensive farming as the major development." (Note: Stanley Baker was the Guardian's agriculture correspondent.)
    • "Head to head: Intensive farming", BBC News, March 6, 2001: "Here, Green MEP Caroline Lucas takes issue with the intensive farming methods of recent decades ... In the wake of the spread of BSE from the UK to the continent of Europe, the German Government has appointed an Agriculture Minister from the Green Party. She intends to end factory farming in her country. This must be the way forward and we should end industrial agriculture in this country as well."
  2. ^ Sources discussing "industrial farming" , "industrial agriculture" and "factory farming":
    • "Annex 2. Permitted substances for the production of organic foods", Food and Agriculture Organization of the United Nations: "'Factory' farming refers to industrial management systems that are heavily reliant on veterinary and feed inputs not permitted in organic agriculture.
    • "Head to head: Intensive farming", BBC News, March 6, 2001: "Here, Green MEP Caroline Lucas takes issue with the intensive farming methods of recent decades ... In the wake of the spread of BSE from the UK to the continent of Europe, the German Government has appointed an Agriculture Minister from the Green Party. She intends to end factory farming in her country. This must be the way forward and we should end industrial agriculture in this country as well."
  3. ^ a b c Kaufmann, Mark. "Largest Pork Processor to Phase Out Crates", The Washington Post, January 26, 2007.
  4. ^ a b "EU tackles BSE crisis", BBC News, November 29, 2000.
  5. ^ "Is factory farming really cheaper?" in New Scientist, Institution of Electrical Engineers, New Science Publications, University of Michigan, 1971, p. 12.
  6. ^ "Factory farming," Encyclopaedia Britannica, 2007.
  7. ^ "Scientists: factory farming drop could end mad cow", CNN/Reuters, December 4, 2000.
  8. ^ "Sweeping changes to British farming", BBC News, December 1, 1965, with a more recent (undated) summary of the context.
  9. ^ UN agency warns increased meat production could lead to higher risks of diseases, Herald Tribune, September 17, 2007
  10. ^ VOA News article Demand for Animal Products May Double in 20 years published October 16, 2007
  11. ^ Oxford English Dictionary, Second Ed. — factory
  12. ^ Alberta Farm Animal Care Update, Fall 2005
  13. ^ Britannica concise definition
  14. ^ Factory farming, Webster's New Millennium Dictionary of English, Preview Edition (v 0.9.6). Lexico Publishing Group, LLC. (accessed: April 4, 2007).
  15. ^ purdue.edu Manure-handle Glossary
  16. ^ "Confined Animal Feeding Operations (CAFOS)/Factory Farming", Library of Michigan Bibliography.
  17. ^ a b "State of the World 2006," Worldwatch Institute, p. 26.
  18. ^ a b c "Concentrated animal feeding operations", Centers for Disease Control and Prevention, United States Department of Health and Human Services.
  19. ^ Comparative Standards for Intensive Livestock Operations in Canada, Mexico, and the United States.
  20. ^ ext.vt.edu General Permit Requirements for Confined Animal Feeding Operations in Virginia
  21. ^ Sierra Club Clean Water and Factory Farms - Frequently Asked Questions
  22. ^ "The History of Factory Farming", United Nations.
  23. ^ Baker, Stanley. "Factory farms—the only answer to our growing appetite?", The Guardian, December 29, 1964.
  24. ^ It doubled between 1820 and 1920; between 1920 and 1950; between 1950 and 1965; and again between 1965 and 1975. Scully, Matthew. Dominion, St. Martin's Griffin, p. 29.
  25. ^ a b c Scully, Matthew. Dominion, St. Martin's Griffin, p. 29.
  26. ^ Testimony by Leland Swenson, president of the U.S. National Farmers' Union, before the House Judiciary Committee, September 12, 2000.
  27. ^ Shen, Fern. "Md. Hog Farm Causing Quite a Stink," The Washington Post, May 23, 1999; and Plain, Ronald L. "Trends in U.S. Swine Industry," U.S. Meat Export Federation Conference, September 24, 1997, cited in Scully, Matthew. Dominion, St. Martin's Griffin, p. 29.
  28. ^ a b c Avery, Dennis. "Big Hog Farms Help the Environment," Des Moines Register, December 7, 1997, cited in Scully, Matthew. Dominion, St. Martin's Griffin, p. 30.
  29. ^ a b Avery, Denis. "Commencement address," University of California, Berkeley, College of Natural Resources, May 21, 2000, cited in Scully, Matthew. Dominion, St. Martin's Griffin, p. 30.
  30. ^ Scully, Matthew. Dominion, St. Martin's Griffin, pp. 259.
  31. ^ a b Scully, Matthew. Dominion, St. Martin's Griffin, 2002, p. 258.
  32. ^ Scully, Matthew. Dominion, St. Martin's Griffin, 2002, pp. 255–256.
  33. ^ Sweeten, John et al. "Fact Sheet #1: A Brief History and Background of the EPA CAFO Rule". MidWest Plan Service, Iowa State University, July 2003.
  34. ^ Orlando, Laura. McFarms Go Wild, Dollars and Sense, July/August 1998, cited in Scully, Matthew. Dominion, St. Martin's Griffin, p. 257.
  35. ^ "Intensive farming is 'conservation triumph'," Chemistry and Industry, December 1, 1997.
  36. ^ http://www.fawc.org.uk/reports/pigs/fawcp006.htm Farm Animal Welfare Committee Report
  37. ^ Livestock's Long Shadow
  38. ^ a b http://www.kt.iger.bbsrc.ac.uk/FACT%20sheet%20PDF%20files/kt32.pdf UK DEFRA comment on de-beaking recognising it as cruel
  39. ^ http://www.fawc.org.uk/default.htm Farm Animal Welfare Council
  40. ^ http://www.defra.gov.uk/news/2007/070508b.htm DEFRA press release
  41. ^ Barnett JL, Hemsworth PH, Cronin GM, Jongman EC, and Hutson GD. 2001. "A review of the welfare issues for sows and piglets in relation to housing," Australian Journal of Agricultural Research 52:1-28. Cited in: Pajor EA. 2002. "Group housing of sows in small pens: advantages, disadvantages and recent research," In: Reynells R (ed.), Proceedings: Symposium on Swine Housing and Well-being (Des Moines, Iowa: U.S. Department of Agriculture Agricultural Research Service, June 5, pp. 37-44). In: An HSUS Report: Welfare Issues with Gestation Crates for Pregnant Sows, Humane Society of the United States.
  42. ^ The Welfare of Sows in Gestation Crates: A Summary of the Scientific Evidence., Farm Sanctuary.
  43. ^ "An HSUS Report: Welfare Issues with Gestation Crates for Pregnant Sows", The Humane Society of the United States, January 6, 2006.
  44. ^ The true cost of cheap chicken - Home News, UK - Independent.co.uk
  45. ^ Animal rights concerns grow in California
  46. ^ Washington Post: Largest Pork Processor to Phase Out Crates
  47. ^ The benefits of pesticides: A story worth telling. Purdue.edu. Retrieved on September 15, 2007.
  48. ^ a b Kellogg RL, Nehring R, Grube A, Goss DW, and Plotkin S (February 2000), Environmental indicators of pesticide leaching and run-off from farm fields. United States Department of Agriculture Natural Resources Conservation Service. Retrieved on 2007-10-03.
  49. ^ a b Miller GT (2004), Sustaining the Earth, 6th edition. Thompson Learning, Inc. Pacific Grove, California. Chapter 9, Pages 211-216.
  50. ^ Sustainable Table article Pesticides
  51. ^ Pesticides In the Environment. Pesticide fact sheets and tutorial, module 6. cornell.edu. Retrieved on September 19, 2007.
  52. ^ Food Standards Agency - VPC report on growth hormones in meat
  53. ^ EU‑AGRINET article Fighting swine fever in Europe (Project Coordinator: Dr Trevor Drew at Veterinary Laboratories Agency)
  54. ^ Dairy in Pennsylvania: A VITAL ELEMENT FOR ECONOMIC DEVELOPMENT[1]
  55. ^ "Agricultural Antibiotic Use Contributes To 'Super-bugs' In Humans", ScienceDaily, July 5, 2005.
  56. ^ Webster, Robert G. "H5N1 Outbreaks and Enzootic Influenza", CDC.
  57. ^ "Factory farms are responsible for bird flu, according to a new report", NF News, February 20, 2007. 
  58. ^ Stephen Leahy. "Report Blames Factory Farms for Bird Flu", IPS, February 21, 2007. 
  59. ^ Facts about Pollution from Livestock Farms. National Resource Defense Council. Retrieved on 2006-05-30.
  60. ^ "The Welfare of Intensively Kept Pigs—Report of the Scientific Veterinary Committee—Adopted 30 September 1997, European Commission, and "Opinion of the AHAW Panel related to the welfare aspects of various systems of keeping laying hens", European Food Safety Authority (7 March 2005)
  61. ^ http://www.asiasource.org/asip/swaminathan.cfm Science and Our Agricultural Future M. S. Swaminathan UNESCO Chair in Ecotechnology M. S. Swaminathan Research Foundation, Chennai, India

[edit] Further reading