11.   There is a large body of research which indicates that passive smoking causes cancer.

12.   These proto-oncogenes can apparently cause cancer when something happens to disrupt their normal activities.

13.   They had received little training on the job, and had not been plainly told that plutonium caused cancer.

14.   This suggested that unlike adult cancers, childhood cancers were not caused by factors in the environment.

15.   Too much exposure to the sun can cause skin cancer.

16.   It has been said that stress causes cancer.

17.   Heredity is not a factor in causing the cancer.

18.   An issuable claim that the food additive causes cancer.

19.   Its most controversial aspect was to attack agro-chemical risks in food by banning all pesticides known to cause cancer or harm a developing fetus.