Environmentalists are outraged after Mexican authorities gave approval earlier this month to five hotel chains to build a tourist center in a sea turtle sanctuary in southeastern Mexico near Cancun. Enviros say the project, intended to span nearly 400 acres, would disturb a beach area frequented by endangered sea turtles and destroy endangered chit palms. Araceli Dominguez, head of the Mayan Ecologist Group, said her organization is considering legal measures to challenge approval of the project.