Except that secondhand smoke is a crock just like human-caused global warming!
10 years ago or more El Rushbo cited a WHO, World Health Organization study that was done in Europe to document the perils of secondhand smoke. What they found was that the full strength smoke inhaled by the smoker IS harmful.
But secondhand smoke is diluted so much when it reaches the bystander that, while the SMELL may be unpleasant, the actual physiological hazard is practically nil. So since the result of the study didn’t fit their agenda, they spiked the story, never published it and most people know nothing about it. What else is new for commie-libs?!
Primary danger of second hand pot fumes is you will get just enough to test positive. Many times I’ve walked down a hotel hallway. By the time you can smell it, a sensitive test can pick it up. Another reason I object to mandatory pee-in-a-bottle tests for employment. I will not take a job mandating such tests.