Like filling a bathtub

 From a toot by Stefan Rahmstorf

Cumulative emissions related to temperature. This is due to the very long life of CO2 in the atmosphere, tens of thousands of years.
We fill the atmosphere with CO2 like a bathtub with water. The longer the tap remains open, the higher the water level. [Translated from the German by LibreTranslate]

The conclusion we can draw from this chart is really, really simple.  To stop temperatures rising, we need to stop CO2 emissions, as soon as possible.  At the moment, emissions continue apace.  In fact, they're rising.   So cumulative emissions are rising even faster.