per day. Many golf courses are now irrigated with non-potable water and rainwater. In 1988, the U.S. Environmental Protection Agency prohibited the use of Diazinon on golf courses and sod farms because of its negative impact on bird species. Environmentalists and other activists continue to lobby against the building of new golf courses, claiming they may impede corridors for migrating animals and damage sanctuaries for birds and other wildlife, though some courses have become havens for native and non-native creatures.