> If I don't do that, then I'm not going to give a shit about this phenomena anyhow.

I fear that any savings in CO2 emissions will be useless, due to an increasing world population.

> Heating accounts probably about half of my carbon footprint

Heating, travel, transportation, industrial production, production of chemicals, production of concrete/cement ( https://www.bbc.com/news/science-environment-46455844 ), food production, ... all those need to be addressed across the whole spectrum of climate-active gas - not just Co2, but also Methan and others.