Geneva Solutions IUCN News Publié le 23 juillet 2020 16:27. Modifié le 23 juillet 2020 17:54. IUCN creates a global standard for evaluating trendy "nature-based solutions" par Kyra Dupont Troubetzkoy Climate change illustrated: Recreation of Leonardo da Vinci's 'Vitruvian Man' melts in the Arctic sea, 800 kilometres from the North Pole. (Credit: Keystone)