eclipse wrote:Could synthetic limestone in the world's concrete market and massive kelp farms to stimulate fisheries REALLY sequester 50 GT CO2 per year, sequestering a TRILLION TONS of CO2 by 2050 and putting us back to 300ppm? That's the claim of the Foundation For Climate Restoration - PDF at link below.
https://eclipsenow.wordpress.com/2021/0 ... l-by-2050/
I have no idea, but it's sure good to see such potential from ideas like that. What I DO know is:
1). The CO2 production from ordinary concrete is simply huge.
2). Barring something out of left field re technology, the need for concrete will continue to grow massively, as the global economy continues to grow massively, over time.
I still think it will take a "Star Trek" level technological drive focused on CO2 (and GHG's generally) mitigation ON TOP OF all the other efforts humanity makes to try to thread the needle on AGW mitigation and keeping society running in a way that is politically viable, for as far as the eye can see.
The problem, of course, will be how much that mitigation will COST with all the other issues vying for "fix me now" level attention from governments. (And I don't see the funding for all that GHG mitigation coming from private hands, unless it's to avoid truly draconian government penalties from excess CO2 production by corporations -- and again, there's the whole political viability issue which makes me doubt that really happens).
Given the track record of the perma-doomer blogs, I wouldn't bet a fast crash doomer's money on their predictions.