Greasy hair 'cleans' the air you breathe

Greasy hair may not help you to attract the object of your affection, but it might reduce the amount of ozone you breathe in. Lakshmi Pandrangi and Glenn Morrison from the University of Missouri in Rolla exposed eight washed and eight unwashed hair samples to ozone for 24 hours. They found that, on average, unwashed hair. absorbs around seven times as much ozone as freshly washed hair