The Aichi Biodiversity Targets were adopted by the parties to the Convention on Biological Diversity in 2010, and at least some aspects of them (slightly confusing to me) were incorporated in the Sustainable Development Goals adopted by the UN in 2015. In short, my understanding from a quick skim is that the target is to protect 17% of land area. The current status is reported in a Protected Planet report that the UN produces every two years. (Disclaimer: I could easily have some details wrong here.)

In terms of the representation element of Aichi Biodiversity Target 11, less than half of the world’s 823 terrestrial ecoregions have at least 17% of their area in PAs and only one third of the 232 marine ecoregions have at least 10% of their area protected. Less than 20% of Key Biodiversity Areas are completely protected, and therefore further efforts are needed to expand PA systems to ensure that the global PA estate adequately covers areas important for biodiversity and the provision of ecosystem services to people.