The EU’s climate monitor said on Thursday that August was the hottest single month ever recorded globally, with ocean temperatures also reaching unprecedented highs as western Europe capped its warmest summer. In response to the assessment by the Copernicus Climate Change Service, the UN warned that until humanity weaned off fossil fuels, the planet would only push deeper into uncharted territory. Copernicus observations go back to 1940 but other evidence – such as ice cores, tree rings and...