tobacco use in the workplace 30+ Employee Smoking Statistics: what is occupational exposure to

Direct impairment of vascular function by diesel exhaust particulate through reduced bioavailability of endothelium-derived nitric oxide induced by superoxide free radicals

West had suggested that cannabis might improve vision by acting on the eye muscles to dilate the pupils, so that more light falls on the retina, but other experiments ruled this out by showing that marijuana constricts the pupils

When women did smoke, it was usually as an expression of character -- deviance, sexual promiscuity, mental illness, etc

This is because smoking weakens the immune system

"Nicotiana attenuata Data Hub - The resource for the coyote tobacco genome"