Aside from mouth cancer, the researchers noted that all of the 11 cancers were linked to obesity. Six (liver, bowel, mouth, pancreas, kidney, and ovary cancers) were linked to smoking, while four (liver, bowel, mouth, and breast) are associated with a high alcohol intake.
Article source: https://www.huffingtonpost.co.uk/entry/cancers-rising-young-adults_uk_69f0cb17e4b01910ba196391