what is an animal or plant that is in danger of extinction or that has been in danger of extinction in the recent past?

what is an animal or plant that is in danger of extinction or that has been in danger of extinction in the recent past? what are some of the environmental problems that would occur if the species became extinct. what are the efforts that have been made to preserve the species, and any opposition the efforts faced. how successful the efforts have been, and what accounts for their success or failure. what laws deal with this species protection