3 ms·

Or maybe higher IQ means lower likelihood of having to work as a coal miner (or in other occupations that expose the worker to similar types of pollution and ca

Or maybe higher IQ means lower likelihood of having to work as a coal miner (or in other occupations that expose the worker to similar types of pollution and carcinogens)?

tachyoff 9y ago
It’s a bit of both, I’m sure. It’s no secret that poverty positively correlates with unhealthy habits, and there are far more smokers than coal miners.