Some CO2 is absorbed by carbon sinks, but some will remain in the atmosphere, more and more as our emissions grow, the ocean warms and acidifies and land respirates the carbon into the atmosphere.
Increased CO2 concentration increases the temperature, what in turn activates the climate change feedbacks, such as melting of Arctic ice sheet or more water vapor in the atmosphere, what leads to additional warming.
Yes, climate change mechanisms are REALLY sophisticated. That is why we have prepared the simulator, that will help you understand:

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Wykonanie Harmonika, grafika GFX RedFrosch, opieka merytoryczna DS Software.