And carbon dioxide comes mostly from water vapour

Really? Please explain how heating H2O creates CO2.

CO2 IS NOT A POLLUTANT – IT IS A NATURALLY PRODUCED GAS

Lots of things are naturally produced. That does not mean that dramatically increasing their production has no consequences.

CO2 is produced by ALL LIVING ORGANISMS. Bacteria and other microorganisms produce more CO2 than all humans put together could ever produce. In fact human contribution to atmospheric CO2 is less than 0.3% of the total.

Which is totally why atmospheric CO2 massively increased when we started using fossil fuels.

Where does the rest come from? – well, from water vapour mostly.

Yep, that magical water magically creating Carbon atoms that aren't part of water at all!

Jesus where did you learn your science? Oh right, conspiracy theory sites...