Original sentence: Criticism has increased in Europe due to a series of events associated with modern farming techniques, including incidents of swine fever, BSE, foot and mouth and bird flu together with concern over animal welfare.Factory farming attracts controversy in that the advantages such as making food production more efficient, cheap and available are balanced against the harm the environment and the health risks of the approach.and abuses animals.that it is needed to feed the growing global human population, and that it protects the environment
Edited sentence: Opponents argue that it harms the environment, creates health risks, and abuses animals.Proponents of factory farming argue that it makes food production more efficient, that the animals are looked after in state-of-the-art confinement facilities and are content, that it is needed to feed the growing global human population, and that it protects the environment.The practice has become increasingly unpopular in Europe due to a series of events associated with modern farming techniques, including incidents of swine fever, BSE, foot and mouth and bird flu together with concern over animal welfare