https://www.sciencedaily.com/releases/2019/04/190411145110.htm

In 2010, parties to the Convention on Biological Diversity (CBD) committed themselves to the CBD Strategic Plan for Biodiversity 2011-2020 and its 20 Aichi Biodiversity Targets. By adopting the plan and its accompanying targets, the signatories promised to limit biodiversity loss by protecting natural habitats and expanding protected areas to 17% of the world's land and 10% of the oceans by 2020.

Although substantial advances were made in terms of expanding the number and size of protected areas globally, biodiversity continues to decline both within and outside these areas. In addition, the placement and resourcing of the majority of protected areas have been poor, with many new protected areas being established in locations, which are often unimportant for biodiversity or not immediately threatened, and therefore have little conservation value. This trend also extends to the oceans.