The world’s food system network generates between 21% and 37% of our greenhouse gas emissions yearly. A population approaching 10 billion by mid-century, means the system’s greenhouse gas emissions, unchecked, could grow to 50% and 80% by then. State-of-the-art agricultural technology and management can stop this, even resulting in more than 13 billion tons of net negative greenhouse gas emissions annually. The most effective approach is to boost soil modifications for crops (biochar, compost and rock amendments), develop agroforestry, advance sustainable seafood harvesting, and promote hydrogen-powered fertilizer production. Silicate rock dust added to crop soils can accelerate carbonate formation and devour carbon dioxide, sequestering several billion metric tons of carbon per year. Planting trees on unused farmland can impound up to 10.3 billion metric tons of carbon annually; seaweed farmed at the ocean surface, then buried in the deep sea, can remove up to 10.7 billion metric tons of CO2; supplementing livestock feed with additives could reduce methane emissions by 1.7 billion metric tons; and applying biochar to croplands may reduce nitrous oxide emissions by 2.3 billion metric tons.
https://news.cornell.edu/stories/2023/09/ag-tech-can-cut-billions-tons-greenhouse-gas-emissions