http://www.bbc.co.uk/news/health-14183871
Quote:
Investigators say the findings, from a study of over 1,500 US teens aged 12 to 19, suggest that secondhand tobacco smoke directly damages young ears.
And the greater the exposure the greater the damage.
Often it was enough to impair a teen's ability to understand speech, Archives of Otolaryngology - Head & Neck Surgery reports.
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Well, that explains a lot .....
