Exposing fruit juices or squeezed juices in bottles to hot sun can cause cancer. Other causes include use of cosmetics containing propyl alcohol, liver and lung flukes,frying foods,use of white sugar products and drinks, pesticide treated fruits like apple skins,heavy indulgence of red meat,growth hormone treated beef and milk,alcohol,drug abuse,dehydration,,pollution from smokes,,cigar,,kitchen,radiation from masts,some cell phones,staying toi near the tv which emits xrays,transformers etc