Air fresheners are big business these days -- in my grocery store almost a half of an aisle is devoted to all the different styles and scents of air fresheners and air sanitizers. But how healthy are they?

Last week the National Resources Defense council released a study that shows that most air fresheners (12 out of the 14 they tested) contain controversial chemicals called phthalates. Phthalates have been linked to health issues such as cancer, developmental abnormalities, and fertility. And although the U.S. doesn't regulate phthalates some other countries do, which is a little disconcerting.

Even if there isn't any "proof" that phthalates are dangerous, I for one will be making an effort to use one of those 2 brands that tested negative for them: Febreze Air Effects Air Refresher and Renuzit Subtle Effects.