Young farm workers are at a greater risk than older or adult farm workers of injury, but this issue is not addressed to the full extent due to nonexistence in the statistics of the Bureau of Labor, which only regards those of age 16 and older. Increase of young farm workers could be attributed to the rising trend of "return to farming". Not only young workers, but women farm workers are increasing at a steady rate as the lead operators of the farm industries. Illnesses and injuries regarding agriculture can vary from one farm to another, according to which industry or sector the farm specializes in. This becomes more apparent as the environment of each farm is different according to these specialties, which in turn poses different areas of risk factors leading to injuries and ailments. In all though, there are similarities in the risk factors and illnesses that agricultural workers face on a day to day basis as in injuries from machinery, large animals, pesticides, respiratory illness-causing factors, musculoskeletal disorders, hearing loss, reproductive issues regarding women, and many more. The most common illnesses seem to be musculoskeletal disorders, pesticide poisoning, and respiratory diseases. According to a 2011 study by the National Agricultural Statistics Service, a major cause of injury and deaths in the workplace comes from farm machinery/vehicles, specifically tractor overturns. Musculoskeletal disorders can arise from a number of factors, but the main causes seem to be from livestock and large machinery/equipment. Machinery are usually devoid of safety measures and pose a greater threat, since agricultural workers fix and operate these machines themselves for utilization in the fields. These machines may also be run while repairs are under way, causing even more instances of potential injuries. Bending, twisting, and stretching motions that are apparent when operating these equipment causes much back and neck strain, leading to more exacerbated conditions over time. This is in regards to not only agricultural workers operating machinery, but also workers in the fields, who experience pain and strains in the wrists, back, hips, and knees. Livestock can also pose a threat to the musculoskeletal systems of the body due to their large weight and varied behavior, possibly leading to kicking and unintentional blows by the animal to the agricultural worker. No matter the cause, it is apparent that musculoskeletal disorders are common in the agricultural industry and need to be addressed to treat the ailment as quickly as possible. In a study regarding agricultural work safety climate of approximately 300 North Carolina migrant farmworkers, 40% had musculoskeletal ailments and many reported numerous days working while ill.