BY CHRIS MORRISON 5 SEPTEMBER 2023 READ

A major new study involving 37 scientists from 18 countries has concluded that global temperature estimates since 1850 have been heavily contaminated by the growth of urban heat where the thermometers are sited. The UN-backed Intergovernmental Panel on Climate Change (IPCC) claims that urban heat accounts for less than 10% of recorded global warming, but the scientists found that figure is nearer 40%. They observe that a rural-and-urban blend of temperatures indicates a long-term warming trend of 0.89°C per century, while a rural-only collection shows only a rise of 0.55°C in the same time period.