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The figures are for USA only, but you're counting the whole world. >>> import pint >>> r=pint.UnitRegistry() >>> usa = r.Quantity(9833517,"km*2") >>> h = r.Qua
by time4tea 3y ago
The figures are for USA only, but you're counting the whole world.
>>> import pint
>>> r=pint.UnitRegistry()
>>> usa = r.Quantity(9833517,"km*2")
>>> h = r.Quantity(35000, "ft")
>>> v = usa * h
>>> naturally = r.Quantity(0.1, "ug") / r.Quantity(1, "m * 3")
>>> natural_total = naturally * v
>>> natural_total.to('ton') <Quantity(11563.6821, 'ton')>
Natural total in USA, up to 35,000ft is 11,000 tons, and added is 113,000 tons.
So the leaded avgas has added 10x.
Assuming uniform distribution up to that height, and that it doesn't disappear. Neither of those things are true, especially as the lead is absorbed by people and animals.