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From	Message
lord_shiva 20-Nov-21, 10:47	Earth's Sustainable Carrying Capacity Earth's radius ain't but 4000 miles. Not too shabby for a "terrestrial" world. Mensuration formula for a sphere surface area is 4pi(r^2). So r^2 is 16 million, time 4pi (about 12) is a bit under two hundred million square miles. Sounds like a lot, but 70% is salt water andanother 10% is ice. That leaves 20% for human habitation and agriculture. Now, we can mine beneath the ocean. So ther is some resource recovery potential there. We harvest fish from the ocean like mad, more than there is. Still, we cannot abide there with current tech. So 20% of two hundred million leaves us forty million square miles. With current technology we can average about 100 people per square mile. We could do more if so much surface was not Gobi, Saharah, Kalahari, and American southwest. So 100 is the average, again given current tech. What is 100 people times forty million square miles yields the total sustainable population--with current tech (an essential caveat). That is NOT at a first world standard, but at a third. For first world we need to cut that down by a factor of about eight.
mo-oneandmore 20-Nov-21, 17:05	Deleted by mo-oneandmore on 20-Nov-21, 17:11.
mo-oneandmore 20-Nov-21, 17:10	Your: 4pi(r^2) Why the isolating brackets in your formula, Paul? Is it because Gameknot doesn't have a symbol for Pi? A=4nir2 (with an N) seems to at least LOOK more correct to me.
lord_shiva 26-Nov-21, 01:19	I wanted it to be clear the radius is squared. A=4πr² <<The pi symbol (π) is a mathematical sign which is also used in Greek letters. There are several ways to display a pi symbol using HTML and unicode.>> I had to paste this whole paragraph, then select, copy, and paste the single character I wanted. Too much work.

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