Here's a timeline that goes back 20k years: https://xkcd.com/1732/ https://xkcd.com/1732/ There's no better explanation for the abrupt increase in temperatures

Here's a timeline that goes back 20k years: https://xkcd.com/1732/ https://xkcd.com/1732/ There's no better explanation for the abrupt increase in temperatures since 1900 other than emissions from burning fossil fuels.