I'd never allow someone to smoke a cigarette inside my home or office. And yet, until recently, I never thought twice about burning candles...scented or otherwise, for romance or for stress relief. However, an increasing number of indoor air quality scientists are sounding the alarm about the ability of candles to emit pollutants like benzene, styrene, toluene, acetone and particular matter. Some core wicks on imported candles have even been found to be made of lead.