Wolffia, Chlorella, and Spirulina grow EVERYWHERE inhabitable on Earth.
All three contain every essential amino and fatty acid, so they are viable substitutes for meat: in fact, by weight, Chlorella and Spirulina each contain 3x as much protein as steak.
All three DOUBLE in mass EACH DAY under optimal growing conditions.
Wolffia and Chlorella each contain the B12 vitamin.
All three are excellent sources of iron, calcium, and other essential minerals.
All three can be grown in small spaces.
All three ALSO contain every essential amino acid for dogs and chickens: chickens love eating all three.
It turns out the MOST nutrient dense and highest protein food on Earth is pond scum.
JUST SAYING.
Earth IS Eden.