At least three-quarters of climate change is man-made

Since 1950, the average global surface air temperature has increased by more than 0.5 °C. To separate human and natural causes of warming, the researchers analysed changes in the balance of heat energy entering and leaving Earth — a new ‘attribution’ method for understanding the physical causes of climate change. Greenhouse gases such as carbon dioxide have contributed around 0.85 °C to global warming since the 1950s. The massive increase of atmospheric CO2 concentrations since pre-industrial times would, in fact, have caused substantially more surface warming were it not for the cooling effects of atmospheric aerosols such as black carbon.

News Reporter

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