> AFAIK, one of the things that produces the most CO2, and that we're not doing very much about (or even discussing) just yet, is the production of concrete. I

> AFAIK, one of the things that produces the most CO2, and that we're not doing very much about (or even discussing) just yet, is the production of concrete. I don't think that's true, I've seen it discussed quite a bit. It's just that there isn't an 'easy' fix, i.e. there isn't a replacement ready to go like there is with electricity production, discounting costs. Same goes for other industrial processes,