How much land is needed to safeguard biodiversity?
To safeguard biodiversity, 44% of the global land area needs to be covered by conservation measures such as protected areas or land use policies, finds this paper. The proportion of land that must be conserved varies by country, with high values in countries such as Canada (84%, because of its extensive intact ecosystems), and Costa Rica (86%, because it hosts many species). On average, the calculated values show that more land should be conserved in developed economies (55%) than in developing economies (30%), partly due to large ecologically intact areas of Canada and Australia. The authors stress that any conservation policies must respect the rights of people living in the affected areas.