Beeswax is the only fuel to emit negative ions when burning . Dust , hair , odors and other things floating in the air are doing so because the particles are positively charged . Beeswax candles purify the air instead of giving off fumes and black soot as paraffin candles do . Allergens and toxins become positively charged through static electricity created by heating systems and friction caused by normal activity ( such as when you walk across the carpet ). This ensures that the fumes are non-toxic and nonallergenic . Pure beeswax candles help rid your home of toxins by emitting negatively , charged ions , as well as , burning away positively charged particles that float toward the burning halo flame . This process cleans the air of positive ions such as dust , odors , toxins , pollen , mold , dust mites , and viruses . This is beneficial for people who have allergies , and environmental sensitivities and who are diagnosed with asthma . Paraffin is a by-product of the petroleum industry . It is what is left after all the gas and oil is removed from the crude oil . It needs to be bleached and scented using a chemical process , and when burned , will release these toxins and impurities into the air . People with asthma , allergies or other respiratory problems should be especially aware of this .