Most cheap candles you buy at the supermarket are made from paraffin wax, which is a byproduct of oil refining. Even the wicks of some candles can cause problems - they may have a lead or other type of metal core that release toxic emissions during burning.

What's in your bottle of shampoo? Could you be unknowingly poisoning the environment? After looking at the ingredients on my shampoo bottle, I was rather disgusted by the chemical cocktail I've been applying to my hair and flushing down the drain.