Sustainable Development Goal 15 is aimed at addressing the current rate of biodiversity loss, which some experts believe to be unprecedented since the last major global extinction event 65 million years ago. In Asia and the Pacific, the problems of biodiversity loss and ecological degradation have been growing. Protected areas are one of the main tools used by Governments for conservation of the remaining forests, but these efforts have had mixed results, according to statistics on primary forests and numbers of threatened species.