41. Most intercalators are large polyaromatic compounds and are known or suspected carcinogens . 42. Some methods of food preservation are known to create carcinogens . 43. Carcinogens cause mutations in these genes which induce the development of cancer.44. Over fifty known carcinogens have been identified in cannabis smoke. 45. At high temperatures, a potential carcinogen called acrylamide can be formed. 46. Whole Foods has faced lawsuits in California over the presence of carcinogens . 47. Some pine tar products contain creosote, a probable carcinogen . 48. All together these Sudan dyes mentioned above belong to category 3 carcinogens . 49. Tumours can also develop if the animal is exposed to chemical carcinogens . 50. Pyrolysis of coal produces polycyclic aromatic hydrocarbons, which are known carcinogens .