Air fresheners are a staple in most U.S. households; however, traditional air fresheners are a hotbed of toxic substances that could leave people chronically ill, brain-damaged or infertile. Tests conducted by the Natural Resources Defense Council showed that most air fresheners contain phthalates that interfere with male hormone production.
Also, most air fresheners are loaded with cancer-causing volatile organic compounds that interfere with cellular regeneration, respiration and reproduction.
Some scented candles are toxic. According to the U.S. Consumer Product Safety Commission study, about half of the scented candles on the market have lead wiring in their wicks that is released into the atmosphere upon burning. The lead may make the wicks more stable; however, it leads to behavioral disorders, hormone disruption and many other health problems.
Also, a lot of candles are made of paraffin wax that creates two toxic compounds, toluene and benzene, when burned. Both compounds are carcinogenic.