> Fertilizer is not a neutral product. I'm not sure what neutral means here, but if it means adding or removing something from the system then sure. Growing an

> Fertilizer is not a neutral product. I'm not sure what neutral means here, but if it means adding or removing something from the system then sure. Growing and harvest is not neutral either, which is why you need other not-neutral processes to replenish what was depleted. This is not negotiable whether it's compost or nitrogen fixing bacteria or whatever. > Adding fertilizer destroys the biodiversity of the soil leading to sicker plants and the need for even more additives in the form of pesticides and fungicides to stave off problems caused by unhealthy soils. Modern farming techniques absolutely cause a holocaust of life, wiping out as much animal, plant, fungus, and other life as possible while leaving the crop. It's also the most cost effective way to mass produce food crops. > So ideally you would replace chemical intensive farming with regenerative organic. Regenerative organic does require more hand labor. What I am saying is that robots could reduce the labor requirement, making it easier to scale regenerative organic. There are a whole host of benefits to this process, cost is not the only concern. In fact people are willing to pay more for their products. Regenerative organic does not avoid the need for the nutrient inputs. That's the thing. It replaces fertilizers with compost and nitrogen fixing, but that's not free and if you scale it up to meet global food production it would probably be much more expensive. Nitrogen for example takes a lot longer to fix than you can apply fertilizer so you would need more land to achieve the same rate of nitrogen use by crops. Compost itself has nowhere near the nutrient density of fertilizers and would become scarce. Before the days of intensive agriculture and before most pesticide and herbicide chemicals and machinery, back when people had to use compost and legumes and things to get nitrogen into soil, guano become one of the biggest industries in the world because of how much more productive it was than those prior techniques. It resulted in such big efficiency gains, that the huge costs of running guano mining operations on remote islands and sending fleets of wooden sailing ships across vast oceans to ship the product were more than covered by the cost advantages at the farm.