Studies have shown that carcinogens released by paraffin wax candles are as dangerous as second hand cigarette smoke and can cause harm to the heart, lungs, circulatory system, and nervous system. Burning paraffin wax candles, releases harmful carcinogens into the atmosphere which can be equated to gasoline being burned by an automobile. Soy Wax is non toxic, water soluble and biodegradable. Soy candles do not produce black soot leaving residue on ceilings, walls and furnishings. They burn longer and more evenly.