evidence: Climate Change ‘Biggest Threat Modern Humans Have Ever Faced’, World-Renowned Naturalist Tells Security Council, Calls for Greater Global Cooperation [...] Throughout the morning, the Council’s high-level open debate on climate and security heard from a range of influential voices, including naturalist David Attenborough, who called climate change "the biggest threat to security that modern humans have ever faced". In video remarks telecast at the outset, he warned that concentrations of carbon dioxide currently in the atmosphere have not been equalled for millions of years. [...] Stressing that the first step to prevent or contain climate-security risks is for the major, and historical, emitters to fulfil — and indeed exceed — the commitments made in the Paris Agreement, he underlined the principle of common but differentiated responsibility. Climate change is an existential threat that disproportionately affects the most vulnerable, especially small island developing States such as Saint Vincent and the Grenadines. "It has become distressingly commonplace for an entire year’s [gross domestic product] to be washed away by a hurricane overnight, even as we are hindered by a lack of a sufficient inclusion, on favourable terms, into the global financial architecture," he said. Citing the many natural hazards in Haiti, in particular, he also drew attention to the Sahel region and the battle for dwindling resources. However, no country is immune to such human-made challenges and all must stand in solidarity, with the Council paying close attention to climate change as it crafts its mandates, he said.