"The number of tourist visiting Antarctica has more than tripled in the past five years ," said James Barnes , a Antarctic activist with the Environmental Defense Fund who calls existing controls to protect U.S. wildlife inadequate. But the bulk of the tourists are Americans brought in by U.S.-based operators. Manheim 's appeal seeks strict controls on helicopter flights near wildlife sites, guidelines on tourist observation of wildlife, and coordination of cruise ship visits to breeding grounds. Because most tourists to Antarctica are Americans , conservations believe the U.S. should take the lead in adopting a model regulatory policy. The U.S. government responds that effective regulations are already in place. the Environmental Defense Fund regulates Antarctic activities in Antarctica .
"The number of tourist visiting Antarctica has more than tripled in the past five years ," said James Barnes , a Antarctic activist with the Environmental Defense Fund who calls existing controls to protect U.S. wildlife inadequate. Manheim 's appeal seeks strict controls on helicopter flights near wildlife sites, guidelines on tourist observation of wildlife, and coordination of cruise ship visits to breeding grounds. Because most tourists to Antarctica are Americans , conservations believe the U.S. should take the lead in adopting a model regulatory policy. The U.S. government responds that effective regulations are already in place. the Environmental Defense Fund regulates Antarctic activities in Antarctica .