Hydroponics and large sized green houses allow multiple levels of growth, meaning you can multiply land significantly for certain crops.
It's not as simple as total number of acres -- and if we were encouraged to eat normal portions instead of eating all this unhealthy processed bullshit that makes us hungry again more quickly, there wouldn't even need to be as much food needed per person.
I know it's not that simple, but for example how are you going to build hydroponics without mining, smelting, pumping water, treating water, electricity generation, storage, concrete production, transportation et cetera, et cetera, all eating up acres.
This is so dumb. It takes some not small number of acres per person to grow enough food/cloths/trees/energy/etc.
There are ~126 billion acres of land. 126 Bn Acres / 8 Bn People ~= 15 acres per person.There are ~36.8 billion acres of land. 36.8 Bn acres / 8 B people ~= 4.5 acres per person.
But how many of those acres are in inhospitable locations like deserts and tundra and mountain ranges?
You're right. I don't know, a lot. The "napkin math" isn't meant to be accurate, but to give a sense of scale.
Hydroponics and large sized green houses allow multiple levels of growth, meaning you can multiply land significantly for certain crops.
It's not as simple as total number of acres -- and if we were encouraged to eat normal portions instead of eating all this unhealthy processed bullshit that makes us hungry again more quickly, there wouldn't even need to be as much food needed per person.
I know it's not that simple, but for example how are you going to build hydroponics without mining, smelting, pumping water, treating water, electricity generation, storage, concrete production, transportation et cetera, et cetera, all eating up acres.
You are including the sea. Just land and it is 4.5 acres per person. Good land that isn't tundra/ice or sandy desert?
You get hardly anything, your nearest neighbours on all sides would be able to see if you are smiling or not.
It seems you're right. My earlier search was erroneous.