It HAS been debunked. Over and over again. And even by the WHO!
and:
Oak Ridge Labs, TN & SECOND HAND SMOKE
Statistics and Data Sciences Group Projects
I think any anti who tries to dismiss the findings of the U.S. Department of Energy labs at Oak Ridge, should be confronted with the question: "Are you saying that DOE researchers committed scientific fraud and that their findings on ETS exposure are untrue?"
Good. Then, by all means, beat that drum for all to hear.
If we can convince the non-smoking public that secondhand smoke poses no real health risk, it becomes a lot easier to convince them that there is no justification for government regulation in the workplace. Muddy the message with the "workers who don't like it can find other jobs" line at your own peril.