Multiple sources indicate we are now living through an unrivalled drop in carbon output. While these energy sources have transformed the world, the carbon seeping into our atmosphere has driven up global temperatures by just over 1C since the mid-1850s. They could rise by 3-4C by the end of this century if CO2 levels aren't savagely reduced.
Source: https://www.bbc.com/news/science-environment-52485712
