And the aromatic essences and fuel additives in the low-quality stuff emit butadiene and benzene, known carcinogens whose toxicity increases five to seven times when burned.
而劣質香所摻入的香精、染料，在燃燒過程中會釋出大量的丁二烯和苯（燃燒時的毒性是常態揮發的 5 ∼ 7 倍），這二者都屬強烈致癌物。