It's hard to answer your question any other way. General speaking the CO2 behavior is quite well understood by now. We know that we make so much CO2 because we measure CO2 in Hawaii for ages https://de.wikipedia.org/wiki/Messstation_Mauna_Loa?wprov=sf...
Please start using the internet for more than just hackernews.
Good to start is always Wikipedia: https://en.wikipedia.org/wiki/Climate_change?wprov=sfla1 after that you can read all sources.
It's hard to answer your question any other way. General speaking the CO2 behavior is quite well understood by now. We know that we make so much CO2 because we measure CO2 in Hawaii for ages https://de.wikipedia.org/wiki/Messstation_Mauna_Loa?wprov=sf...