CO2 from ammonia production is non-substitutable in UK food systems: it stuns livestock, carbonate drinks, preserves fresh food in modified atmosphere packaging, and cools delivery chains via dry ice. One private company's operating decision triggered a £30 million government emergency subsidy to restart production and avert national food shortage.
Source: CF Industries: American company secures bailout from UK government to produce CO2 · CNN Business · Sep 22, 2021