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Human-induced warming (blue shading) reached approximately 1°C above pre-industrial levels in 2017. At the present rate, global temperatures would reach 1.5°C around 2040. Stylized 1.5°C pathway shown here (green shading) involves emission reductions beginning immediately, and CO2 emissions reaching zero by 2055. Graphic appears in FAQ 1.2 in the Frequently Asked Questions supplement to the IPCC Special Report on Global Warming of 1.5°C.