evidence: The sober assessment of our planet's future has been delivered by the UN's Intergovernmental Panel on Climate Change (IPCC), a group of scientists whose findings are endorsed by the world's governments. [...] It is "virtually certain" that hot extremes including heatwaves have become more frequent and more intense since the 1950s, while cold events have become less frequent and less severe [...] There will be an increasing occurrence of some extreme events "unprecedented in the historical record" even at warming of 1.5C