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Beef is the culinary name for meat from cattle, particularly skeletal muscle. Humans have been eating beef since prehistoric times. Beef is a source of protein and nutrients. Most beef can be used as is by merely cutting into certain parts, such as roasts, short ribs or steak (filet mignon, sirloin steak, rump steak, rib steak, rib eye steak, hanger steak, etc.), while other cuts are processed (corned beef or beef jerky). Trimmings, on the other hand, which are usually mixed with meat from older, leaner (therefore tougher) cattle, are ground, minced or used in sausages. The blood is used in some varieties called blood sausage. Other parts that are eaten include other muscles and offal, such as the oxtail, liver, tongue, tripe from the reticulum or rumen, glands (particularly the pancreas and thymus, referred to as sweetbread), the heart, the brain (although forbidden where there is a danger of bovine spongiform encephalopathy, BSE, commonly referred to as mad cow disease), the kidneys, and the tender testicles of the bull (known in the United States as ''calf fries'', ''prairie oysters'', or ''Rocky Mountain oysters''). Some intestines are cooked and eaten as is, but are more often cleaned and used as natural sausage casings. The bones are used for making beef stock. Meat from younger cows (calves) is called veal. Beef from steers and heifers is similar. Depending on economics, the number of heifers kept for breeding varies. The meat from older bulls, because it is usually tougher, is frequently used for mince (known as ground beef in the United States). Cattle raised for beef may be allowed to roam free on grasslands, or may be confined at some stage in pens as part of a large feeding operation called a feedlot (or concentrated animal feeding operation), where they are usually fed a ration of grain, protein, roughage and a vitamin/mineral preblend. Beef is the third most widely consumed meat in the world, accounting for about 25% of meat production worldwide, after pork and poultry at 38% and 30% respectively.Raloff, Janet (31 May 2003)
Food for Thought: Global Food Trends
''Science News''.
In absolute numbers, the United States, Brazil, and the People's Republic of China are the world's three largest consumers of beef; Uruguay, however, has the highest beef and veal consumption per capita, followed by Argentina and Brazil. According to the data from OECD, the average Uruguayan ate over of beef or veal in 2014, representing the highest beef/veal consumption per capita in the world. In comparison, the average American consumed only about beef or veal in the same year, while African countries, such as Mozambique, Ghana, and Nigeria, consumed the least beef or veal per capita. In 2018, the United States, Brazil, and China produced the most beef with 12.22 million tons, 9.9 million tons, and 6.46 million tons respectively. The top 3 beef exporting countries in 2019 were Australia (14.8% of total exports), the United States (13.4% of total exports), and Brazil (12.6% of total exports). Beef production is also important to the economies of Japan, Argentina, Uruguay, Canada, Paraguay, Mexico, Belarus and Nicaragua. Beef production has a high environmental impact per gram of protein.


Etymology


The word ''beef'' is from the Latin ''bōs'', in contrast to ''cow'' which is from Middle English ''cou'' (both words have the same Indo-European root '). After the Norman Conquest, the French-speaking nobles who ruled England naturally used French words to refer to the meats they were served. Thus, various Anglo-Saxon words were used for the animal (such as ''nēat'', or ''cu'' for adult females) by the peasants, but the meat was called ''boef'' (ox) (Modern French ''bœuf'') by the French nobles — who did not often deal with the live animal — when it was served to them. This is one example of the common English dichotomy between the words for animals (with largely Germanic origins) and their meat (with Romanic origins) that is also found in such English word-pairs as pig/pork, deer/venison, sheep/mutton and chicken/poultry (also the less common goat/chevon). ''Beef'' is cognate with ''bovine'' through the Late Latin ''bovīnus''. The rarely used plural form of beef is ''beeves''.


History


People have eaten the flesh of bovines from prehistoric times; some of the earliest known cave paintings, such as those of Lascaux, show aurochs in hunting scenes. People domesticated cattle to provide ready access to beef, milk, and leather. Cattle have been domesticated at least twice over the course of evolutionary history. The first domestication event occurred around 10,500 years ago with the evolution of ''Bos taurus''. The second was more recent, around 7,000 years ago, with the evolution of ''Bos indicus'' in the Indus Valley. There is a possible third domestication even 8,500 years ago, with a potential third species ''Bos africanus'' arising in Africa. Most cattle originated in the Old World, with the exception of bison hybrids, which originated in the Americas. Examples include the Wagyū from Japan, Ankole-Watusi from Egypt, and longhorn Zebu from the Indian subcontinent. It is unknown exactly when people started cooking beef. Cattle were widely used across the Old World as draft animals (oxen), for milk, or specifically for human consumption. With the mechanization of farming, some breeds were specifically bred to increase meat yield, resulting in Chianina and Charolais cattle, or to improve the texture of meat, giving rise to the Murray Grey, Angus, and Wagyū. Some breeds have been selected for both meat and milk production, such as the Brown Swiss (Braunvieh). In the United States, the growth of the beef business was largely due to expansion in the Southwest. Upon the acquisition of grasslands through the Mexican–American War of 1848, and later the expulsion of the Plains Indians from this region and the Midwest, the American livestock industry began, starting primarily with the taming of wild longhorn cattle. Chicago and New York City were the first to benefit from these developments in their stockyards and in their meat markets.


World producers


Top 5 cattle and beef exporting countries (2016) Beef exports, including buffalo meat, in metric tons (2016) Top 10 cattle and beef producing countries (2009, 2010) Beef production (1000 Metric Tons CWE) (2009) National cattle herds (Per 1000 Head)


Farming of beef cattle


Beef cattle are raised and fed using a variety of methods, including feedlots, free range, ranching, backgrounding and intensive animal farming. Concentrated Animal Feeding Operations (CAFOs), commonly referred to as factory farms, are commonly used to meet the demand of beef production. CAFOs supply 70.4% of cows in the US market and 99% of all meat in the United States supply. Cattle CAFOs can also the source of E. coli contamination in the food supply. due to the prevalence of manure in CAFOs. These E. coli contaminations include one strain, E. coli O157:H7, which can be toxic to humans, because cattle typically hold this strain in their digestive system.


Cuts


Beef is first divided into primal cuts, pieces of meat initially butchering. These are basic sections from which steaks and other subdivisions are cut. The term "primal cut" is quite different from "prime cut", used to characterize cuts considered to be of higher quality. Since the animal's legs and neck muscles do the most work, they are the toughest; the meat becomes more tender as distance from ''hoof and horn'' increases. Different countries and cuisines have different cuts and names, and sometimes use the same name for a different cut; for example, the cut described as "brisket" in the United States is from a significantly different part of the carcass than British brisket.


Special beef designations





Breed- and origin-based designations


* Certified Angus Beef (CAB) in Canada and the United States is a specification-based, branded-beef program which was founded in 1978 by Angus cattle producers to increase demand for their breed of cattle, by promoting the impression that Angus cattle have consistent, high-quality beef with superior taste. The brand is owned by the American Angus Association and its 35,000 rancher members. The terms ''Angus Beef'' or ''Black Angus Beef'' are loosely and commonly misused or confused with CAB; this is especially common in the food service industry. The brand or name Certified Angus Beef cannot be legally used by an establishment that is not licensed to do so. In the UK the equivalent is Aberdeen Angus, marketed as higher quality and associated with stricter animal welfare rules. Notable for the herd being free of BSE during the BSE epidemic in the UK. Similar schemes are used elsewhere as in Certified Angus Beef in Ireland. * Certified Hereford Beef is beef certified to have come from Hereford cattle. * Kobe beef is pure Tajima-gyu breed bull that was born, raised, and slaughtered solely within the Hyogo prefecture. Very limited amounts of Kobe are exported. * The EU recognizes the following Protected Designation of Origin beef brands: ::Spain – Carne de Ávila, Carne de Cantabria, Carne de la Sierra de Guadarrama, Carne de Morucha de Salamanca, Carne de Vacuno del País o Euskal Okela, Ternera Galega :: France – Taureau de Camargue, Bœuf charolais du Bourbonnais, Bœuf de Chalosse, Bœuf du Maine ::Portugal – Carne Alentejana, Carne Arouquesa, Carne Barrosã, Carne Cachena da Peneda, Carne da Charneca, Carne de Bovino Cruzado dos Lameiros do Barroso, Carne dos Açores, Carne Marinhoa, Carne Maronesa, Carne Mertolenga, Carne Mirandesa ::United Kingdom – Orkney Beef, Scotch Beef, Welsh Beef ::Belgium – Belgian Blue


Process-based designations


Some certifications are based upon the way the cattle are treated, fed and/or slaughtered. * Grass-fed beef cattle have been raised exclusively on forage. Grain-fed beef cattle are raised primarily on forage, but are "finished" in a feedlot. * Halal beef has been certified to have been processed in a prescribed manner in accordance with Muslim dietary laws. * Kosher beef has been certified to have been processed in a prescribed manner in accordance with Jewish dietary laws. * Organic beef is produced without added hormones, pesticides, or other chemicals, though requirements for labeling it ''organic'' vary widely.


Output-based standards


Some standards are based upon the inspected quality of the meat after slaughter.


Beef grading


Countries regulate the marketing and sale of beef by observing criteria post-slaughter and classifying the observed quality of the meat. This classification, sometimes optional, can suggest a market demand for a particular animal's attributes and therefore the price owed to the producer.


Aging and tenderization


To improve tenderness of beef, it is often aged (i.e., stored refrigerated) to allow endogenous proteolytic enzymes to weaken structural and myofibrillar proteins. Wet aging is accomplished using vacuum packaging to reduce spoilage and yield loss. Dry aging involves hanging primals (usually ribs or loins) in humidity-controlled coolers. Outer surfaces dry out and can support growth of molds (and spoilage bacteria, if too humid), resulting in trim and evaporative losses. Evaporation concentrates the remaining proteins and increases flavor intensity; the molds can contribute a nut-like flavor. After two to three days there are significant effects. The majority of the tenderizing effect occurs in the first 10 days. Boxed beef, stored and distributed in vacuum packaging, is, in effect, wet aged during distribution. Premium steakhouses dry age for 21 to 28 days or wet age up to 45 days for maximum effect on flavor and tenderness. Meat from less tender cuts or older cattle can be mechanically tenderized by forcing small, sharp blades through the cuts to disrupt the proteins. Also, solutions of exogenous proteolytic enzymes (papain, bromelin or ficin) can be injected to augment the endogenous enzymes. Similarly, solutions of salt and sodium phosphates can be injected to soften and swell the myofibrillar proteins. This improves juiciness and tenderness. Salt can improve the flavor, but phosphate can contribute a soapy flavor.


Cooking and preparation


These methods are applicable to all types of meat and some other foodstuffs.


Dry heat





Internal temperature


Beef can be cooked to various degrees, from very rare to well done. The degree of cooking corresponds to the temperature in the approximate center of the meat, which can be measured with a meat thermometer. Beef can be cooked using the sous-vide method, which cooks the entire steak to the same temperature, but when cooked using a method such as broiling or roasting it is typically cooked such that it has a "bulls eye" of doneness, with the least done (coolest) at the center and the most done (warmest) at the outside.


Frying


Meat can be cooked in boiling oil, typically by shallow frying, although deep frying may be used, often for meat enrobed with breadcrumbs as in milanesas or finger steaks. Larger pieces such as steaks may be cooked this way, or meat may be cut smaller as in stir frying, typically an Asian way of cooking: cooking oil with flavorings such as garlic, ginger and onions is put in a very hot wok. Then small pieces of meat are added, followed by ingredients which cook more quickly, such as mixed vegetables. The dish is ready when the ingredients are 'just cooked'.


Moist heat


Moist heat cooking methods include braising, pot roasting, stewing and sous-vide. These techniques are often used for cuts of beef that are tougher, as these longer, lower-temperature cooking methods have time to dissolve connecting tissue which otherwise makes meat remain tough after cooking. * Stewing or simmering :simmering meat, whole or cut into bite-size pieces, in a water-based liquid with flavorings. This technique may be used as part of pressure cooking. * Braising :cooking meats, in a covered container, with small amounts of liquids (usually seasoned or flavored). Unlike stewing, braised meat is not fully immersed in liquid, and usually is browned before the oven step. * Sous-vide :Sous-vide, French for "under vacuum", is a method of cooking food sealed in airtight plastic bags in a water bath for a long time—72 hours is not unknown—at an accurately determined temperature much lower than normally used for other types of cooking. The intention is to maintain the integrity of ingredients and achieve very precise control of cooking. Although water is used in the method, only moisture in or added to the food bags is in contact with the food. Meat has usually been cooked in water which is just simmering, such as in stewing; higher temperatures make meat tougher by causing the proteins to contract. Since thermostatic temperature control became available, cooking at temperatures well below boiling, (sous-vide) to (slow cooking), for prolonged periods has become possible; this is just hot enough to convert the tough collagen in connective tissue into gelatin through hydrolysis, with minimal toughening. With the adequate combination of temperature and cooking time, pathogens, such as bacteria will be killed, and pasteurization can be achieved. Because browning (Maillard reactions) can only occur at higher temperatures (above the boiling point of water), these moist techniques do not develop the flavors associated with browning. Meat will often undergo searing in a very hot pan, grilling or browning with a torch before moist cooking (though sometimes after). Thermostatically controlled methods, such as sous-vide, can also prevent overcooking by bringing the meat to the exact degree of doneness desired, and holding it at that temperature indefinitely. The combination of precise temperature control and long cooking duration makes it possible to be assured that pasteurization has been achieved, both on the surface and the interior of even very thick cuts of meat, which can not be assured with most other cooking techniques. (Although extremely long-duration cooking can break down the texture of the meat to an undesirable degree.) Beef can be cooked quickly at the table through several techniques. In hot pot cooking, such as shabu-shabu, very thinly sliced meat is cooked by the diners at the table by immersing it in a heated pot of water or stock with vegetables. In fondue bourguignonne, diners dip small pieces of beef into a pot of hot oil at the table. Both techniques typically feature accompanying flavorful sauces to complement the meat.


Raw beef


Steak tartare is a French dish made from finely chopped or ground (minced) raw meat (often beef). More accurately, it is scraped so as not to let even the slightest of the sinew fat get into the scraped meat. It is often served with onions, capers, seasonings such as fresh ground pepper and Worcestershire sauce, and sometimes raw egg yolk. The Belgian or Dutch dish ''filet américain'' is also made of finely chopped ground beef, though it is seasoned differently, and either eaten as a main dish or can be used as a dressing for a sandwich. ''Kibbeh nayyeh'' is a similar Lebanese and Syrian dish. And in Ethiopia, a ground raw meat dish called ''tire siga'' or ''kitfo'' is eaten (upon availability). ''Carpaccio'' of beef is a thin slice of raw beef dressed with olive oil, lemon juice and seasoning. Often, the beef is partially frozen before slicing to allow very thin slices to be cut. ''Yukhoe'' is a variety of ''hoe'', raw dishes in Korean cuisine which is usually made from raw ground beef seasoned with various spices or sauces. The beef part used for ''yukhoe'' is tender rump steak. For the seasoning, soy sauce, sugar, salt, sesame oil, green onion, and ground garlic, sesame seed, black pepper and juice of ''bae'' (Korean pear) are used. The beef is mostly topped with the yolk of a raw egg.


Cured, smoked, and dried beef


''Bresaola'' is an air-dried, salted beef that has been aged about two to three months until it becomes hard and a dark red, almost purple, colour. It is lean, has a sweet, musty smell and is tender. It originated in Valtellina, a valley in the Alps of northern Italy's Lombardy region. Bündnerfleisch is a similar product from neighbouring Switzerland. Chipped beef is an American industrially produced air-dried beef product, described by one of its manufacturers as being "similar to bresaola, but not as tasty." Beef jerky is dried, salted, smoked beef popular in the United States. Biltong is a cured, salted, air dried beef popular in South Africa. Pastrami is often made from beef; raw beef is salted, then partly dried and seasoned with various herbs and spices, and smoked. Corned beef is a cut of beef cured or pickled in a seasoned brine. The corn in ''corned beef'' refers to the grains of coarse salts (known as corns) used to cure it. The term ''corned beef'' can denote different styles of brine-cured beef, depending on the region. Some, like American-style corned beef, are highly seasoned and often considered delicatessen fare. Spiced beef is a cured and salted joint of round, topside, or silverside, traditionally served at Christmas in Ireland. It is a form of salt beef, cured with spices and saltpetre, intended to be boiled or broiled in Guinness or a similar stout, and then optionally roasted for a period after.Recipe for traditional dry spiced beef
– An Bord Bia
There are various other recipes for pickled beef. Sauerbraten is a German variant.


Religious and cultural prohibitions


Most Indic religions do not appreciate killing cows and eating Cow meat from the medieval period. In English usage, beef refers to both Cow and Buffalo meat but Hindutva prohibits Cow Beef known as ''Go-Maans'' in Sanskrit. In Hinduism, many of the gods like beef for consumption, especially that of a barren cow and ox. It was a tradition to kill cow for sacrifices, for guests as a respect known as "madhuparka" and consumption of the meat was considered good for having healthy babies (Brihadaranyaka Upanishad VI.4.18). Bovines have a sacred status in India especially the cow, from the idealization due to their provision of sustenance for families. Bovines are generally considered to be integral to the landscape. However, they do not consider the cow to be a god. In Hinduism, the entire cosmic creation is considered to be sacred and are venerated like celestial bodies such as Sun, Moon to fig trees and rivers like Ganga, Saraswati, etc. India as a developing country, many of its rural area economies depend upon cattle farming, hence they have been revered in the society. From vedic periods role of cattle, especially cows, as a source of milk, and dairy products, and their relative importance in transport services and farming like ploughing, row planting, ridging, and weeding made people to revere the importance of cow in their daily lives, and this rose with the advent of Jainism and Gupta period. In medieval India, Maharaja Ranjit Singh issued proclamation on stopping cow slaughter as it is a sentimental issue. Lack of secular tolerance and caste politics has also given birth to Hindu extremist vigilante cow protection groups. Conflicts over cow slaughter often have sparked religious riots that have led to loss of human life and in an 1893 riot alone, more than 100 people were killed for the cause. A. N. Bose in ''Social and Rural Economy of Northern India'' says any taboo or the cow worship itself is a relatively recent development in India. The sacred white Cow is considered as the abode of crores of 33 type Hindu Deities. Products of Cow's milk like curd, butter, cheese, milk sweets are sold commercially and used in religious rituals. For religious reasons the ancient Egyptian priests also refrained from consuming beef. Buddhists and Sikhs are also against wrongful slaughtering of animals but they don't have a wrongful eating doctrine. In the Indigenous American tradition a white buffalo calf is considered sacred, they call it Pte Ska Win (White Buffalo Calf Woman). In ancient China, the killing of cattle and consumption of beef was prohibited, as they were valued for their role in agriculture. This custom is still followed by a small number of Chinese families across the world. During the season of Lent, Orthodox Christians and Catholics periodically give up meat and poultry (and sometimes dairy products and eggs) as a religious act. Observant Jews and Muslims may not eat any meat or poultry which has not been slaughtered and treated in conformance with religious laws.


Legal prohibition





India


India is one of the biggest exporters of buffalo meat. Some states of India prohibit beef for religious and political reasons although Hindu religious scripts do not condemn the consumption of beef. However certain Hindu castes and sects continue to avoid beef from their diets. Article 48 of the Constitution of India mandates the state may take steps for preserving and improving the bovine breeds, and prohibit the slaughter, of cows and calves and other milch and draught cattle. Article 47 of the Constitution of India provides states must raise the level of nutrition and the standard of living and to improve public health as among its primary duties, based on this a reasonableness in slaughter of common cattle was instituted, if the animals ceased to be capable of breeding, providing milk, or serving as draught animals. The overall mismanagement of India's common cattle is dubbed in academic fields as "India's bovine burden." In 2017, a rule against the slaughter of cattle and the eating of beef was signed into law by presidential assent as a modified version of Prevention of Cruelty to Animals Act, 1960. The original act, however, did permit the humane slaughter of animals for use as food. Existing meat export policy in India prohibits the export of beef (meat of cow, oxen and calf). Bone-in meat, a carcass, or half carcass of buffalo is also prohibited from export. Only the boneless meat of buffalo, meat of goat and sheep and birds is permitted for export. In 2017, India sought a total "beef ban" and Australian market analysts predicted that this would create market opportunities for leather traders and meat producers there and elsewhere. Their prediction estimated a twenty percent shortage of beef and a thirteen percent shortage of leather in the world market.


Nepal


The cow is the national animal of Nepal, and slaughter of cattle is prohibited by law.


Cuba


In 2003, Cuba banned cow slaughter due to severe shortage of milk and milk products.


Nutrition and health


Beef is a source of complete protein and it is a rich source (20% or more of the Daily Value, DV) of Niacin, Vitamin B12, iron and zinc. Red meat is the most significant dietary source of carnitine and, like any other meat (pork, fish, veal, lamb etc.), is a source of creatine. Creatine is converted to creatinine during cooking.


Health concerns


;Cancer Excessive consumption of red processed meat is known to increase the risk of bowel cancer and some other cancers. ;Cardiovascular disease and coronary heart disease The Harvard School of Public Health recommends consumers eat red meat sparingly as it has high levels of saturated fat. Another study, however, from The Harvard School of Public Health appearing in Circulation (journal) found "consumption of processed meats, but not red meats, is associated with higher incidence of coronary heart disease and diabetes mellitus." This finding tended to confirm an earlier meta-analysis of the nutritional effects of saturated fat in The American Journal of Clinical Nutrition which found "ospective epidemiologic studies showed that there is no significant evidence for concluding that dietary saturated fat is associated with an increased risk of coronary heart disease or cardiovascular disease. More data are needed to elucidate whether cardiovascular disease risks are likely to be influenced by the specific nutrients used to replace saturated fat." ;Dioxins Some cattle raised in the United States feed on pastures fertilized with sewage sludge. Elevated dioxins may be present in meat from these cattle.


Recalls


Ground beef has been subject to recalls in the United States, due to ''Escherichia coli'' (''E. coli'') contamination: * January 2011, One Great Burger expands recall. * February 2011, American Food Service, a Pico Rivera, Calif. establishment, is recalling approximately of fresh ground beef patties and other bulk packages of ground beef products that may be contaminated with ''E. coli'' O157:H7. * March 2011, beef recalled by Creekstone Farms Premium Beef due to ''E. coli'' concerns. * April 2011, National Beef Packaging recalled more than of ground beef due to ''E. coli'' contamination. * May 2011, Irish Hills Meat Company of Michigan, a Tipton, Mich., establishment is recalling approximately of ground beef products that may be contaminated with ''E. coli'' O157:H7. * September 2011, Tyson Fresh Meats recalled of ground beef due to ''E. coli'' contamination. * December 2011, Tyson Fresh Meats recalled of ground beef due to ''E. coli'' contamination. * January 2012, Hannaford Supermarkets recalled all ground beef with sell by dates 17 December 2011 or earlier. * September 2012, XL Foods recalled more than 1800 products believed to be contaminated with ''E. coli'' 0157:H7. The recalled products were produced at the company's plant in Brooks, Alberta, Canada; this was the largest recall of its kind in Canadian History.


Mad cow disease


In 1984, the use of meat and bone meal in cattle feed resulted in the world's first outbreak of bovine spongiform encephalopathy (BSE or, colloquially, mad cow disease) in the United Kingdom. Since then, other countries have had outbreaks of BSE: * In May 2003, after a cow with BSE was discovered in Alberta, Canada, the American border was closed to live Canadian cattle, but was reopened in early 2005. * In June 2005, Dr. John Clifford, chief veterinary officer for the United States Department of Agriculture animal health inspection service, confirmed a fully domestic case of BSE in Texas. Clifford would not identify the ranch, calling that "privileged information." The 12-year-old animal was alive at the time when Oprah Winfrey raised concerns about cannibalistic feeding practices on her show which aired 16 April 1996. In 2010, the EU, through the European Food Safety Authority (EFSA), proposed a roadmap to gradually lift the restrictions on the feed ban. EU Regulation No 999/2001 had outlined a complete ban on feeding mammal-based products to cattle. A regulation that modified Annex IV of 999/2001, was published in 2013 that allowed for certain milk, fish, eggs, and plant-fed farm animal products to be used.


Environmental impact


The consumption of beef poses numerous threats to the natural environment. Of all agricultural products, beef requires some of the most land and water, and its production results in the greatest amount of greenhouse gas emissions, air pollution, and water pollution. Cattle populations occupy around 24% of all land on Earth, not including the large agricultural fields that are used to grow cattle feed. According to FAO, "Ranching-induced deforestation is one of the main causes of loss of some unique plant and animal species in the tropical rainforests of Central and South America as well as carbon release in the atmosphere." Beef is also the primary driver of deforestation in the Amazon, with around 80% of all converted land being used to rear cattle. 91% of Amazon land deforested since 1970 has been converted to cattle ranching. 41% of global deforestation from 2005 to 2013 has been attributed to the expansion of beef production. This is due to the higher ratio of net energy of gain to net energy of maintenance where metabolizable energy intake is higher.National Research Council. 2000. Nutrient Requirements of Beef Cattle. National Academy Press. It takes seven pounds of feed to produce a pound of beef (live weight), compared to more than three pounds for a pound of pork and less than two pounds for a pound of chicken. Between 70 and 80% of all grain produced in the United States is used as cattle feed. However, assumptions about feed quality are implicit in such generalizations. For example, production of a pound of beef cattle live weight may require between 4 and 5 pounds of feed high in protein and metabolizable energy content, or more than 20 pounds of feed of much lower quality. A simple exchange of beef to soy beans (a common feed source for cattle) in Americans' diets would, according to one estimate, result in meeting between 46 and 74 percent of the reductions needed to meet the 2020 greenhouse gas emission goals of the United States as pledged in 2009. Australian scientists discovered that adding the seaweed Asparagopsis taxiformis to a cow's diet can reduce methane by up to 99%, and reported a 3% seaweed diet resulted in an 80% reduction in methane. Some scientists claim that the demand for beef is contributing to significant biodiversity loss as it is a significant driver of deforestation and habitat destruction; species-rich habitats, such as significant portions of the Amazon region, are being converted to agriculture for meat production. The 2019 IPBES ''Global Assessment Report on Biodiversity and Ecosystem Services'' also concurs that the beef industry plays a significant role in biodiversity loss. Around 25% to nearly 40% of global land surface is being used for livestock farming, which is mostly cattle.


See also


* Argentine beef * Beef Australia * Beef hormone controversy * Bovine Meat and Milk Factors * Buffalo meat * Carnism * Entrecôte * Environmental impact of meat production * List of beef dishes * List of meat animals * Pink slime * Veal


References





External links


*
USDA beef grading standards
(PDF)
Beef State
Documentary produced by Nebraska Educational Telecommunications {{Authority control Category:Cattle products Category:Meat by animal