A few years back there was a population scientist who estimated planet Earth could support "only ~ 3 Billion people in a healthy fashion.
sigh ....
I hate to say even with
- asteroids hitting the earth,
- virus alpha beta charlie ... versions
- tsumani here and there
- volcano here and there
- war here and there
-----
population keep on increasing exponentially,
and CO2 keeps on increasing.
No wonder people keep on planning to stay on Mars.
Or perhaps God waiting for someone to press the very big
red button for Nuclear bombs to destroy the whole world?
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