Climate models suggest humans have caused 0.9 - 1.3°C warming since 1850-1900

International scientists, including an Australian, used computer climate simulations to estimate the human contribution to global warming, and say we've caused between 0.9 and 1.3°C of warming to global air temperatures when comparing 2010-2019 with 1850-1900. The contribution of greenhouse gases lies between 1.2 and 1.9°C, they add. These estimates are a good fit for observed temperature increases of 1.1°C since 1850-1900, the scientists say. Their computer models also suggest natural factors contributed almost nothing to the warming we're currently experiencing, they add.