I don't think we'll ever reduce our CO2 emissions - I've done a couple of decades of sustainability organizing (and professionally, I ran Amazon's initial carbon accounting program) and the best I've seen anyone model is "slightly less growth in CO2 emissions." I suspect we're stuck with sucking it out, and resilience efforts.

I'll check out the online course, thank you. I saw there are a few startups offering capture at an office building scale, and I'll come back with better questions once I learn more!