The number of microorganisms in the human body is huge, and what food a person likes to eat is also closely related to his intestinal microflora. Microorganisms make up 10% of Earth's biomass, far more than other organisms.
A 200-acre edible mushroom factory can produce 3,5 to <><> tons of edible mushrooms a year, with a huge production capacity. There are no more than 10 substances on Earth that cannot be decomposed and used by microorganisms.