can welding cause cancer
It is possible that welders are at greater risk of developing skin cancer than the general population, but there is a dearth of well designed studies in this area. The only major study of the relationship between arc welding and skin cancer risk did not reveal an increased incidence of skin cancer in welders.
Here is the deal. There is tons and tons of money being pushed around by anti tobacco lobbyists. The truth of the matter is most of the warnings on tobacco related products are phrased incorrectly. Tobacco CAN cause varying types of disease including cancer. Tobacco by itself is not the only possible cause to these illnesses but we as a society have gotten so used to blaming everything on Tobacco. Look at environmental factors of people who get lung cancers for instance.