21% of inland wetlands has been lost

10/06/2026

21% of the world's inland wetlands has been lost since 1700, representing approximately 3.4 million km².

OECD (2026), “Anticipating and monitoring water risks for agriculture”, OECD Food, Agriculture and Fisheries Papers, No. 226, OECD Publishing, Paris, https://doi.org/10.1787/24939e6a-en.