This became very apparent when a chemicals company with plants in the UK annouced plans to curtail their ammonia production, and it was going to have a knock-on

This became very apparent when a chemicals company with plants in the UK annouced plans to curtail their ammonia production, and it was going to have a knock-on effect on other industries because they got a lot of their CO2 from that process: https://www.theguardian.com/environment/2021/sep/17/warnings-carbon-dioxide-shortage-could-force-farmers-to-cull-pigs https://www.theguardian.com/environment/2021/sep/17/warnings...