The United States could feed its own population with significantly reduced industrial inputs, particularly if Americans were content to eat only as much meat pe

The United States could feed its own population with significantly reduced industrial inputs, particularly if Americans were content to eat only as much meat per capita as e.g. Japanese people [1]. But the United States has over twice as much arable land per capita as the world average: https://data.worldbank.org/indicator/AG.LND.ARBL.HA.PC https://data.worldbank.org/indicator/AG.LND.ARBL.HA.PC The US is currently one of the world's top exporters of corn, wheat, and soy beans. If the US exported less food then other countries would intensify production further. I don't think that any dietary changes could prevent mass starvation if the world abruptly stopped using artificial nitrogen fertilizers altogether. Microbial protein production is one of the ways that the world could gradually cut back on artificial nitrogen fertilizers, though. Some chemoautotrophs are capable of assimilating atmospheric nitrogen. "Autotrophic nitrogen assimilation and carbon capture for microbial protein production by a novel enrichment of hydrogen-oxidizing bacteria" https://www.powertoprotein.eu/wp-content/uploads/pagination_wr_12112.pdf https://www.powertoprotein.eu/wp-content/uploads/pagination_... [1] https://en.wikipedia.org/wiki/List_of_countries_by_meat_consumption#Meat_consumption_by_country https://en.wikipedia.org/wiki/List_of_countries_by_meat_cons...