It is an interesting study but as noted in another post, fifteen years is not a long time to evaluate cancer risks. Cancer can take decades to start from initial exposure to a carcinogen. My own father died of bladder cancer at age 75. He was a professor of chemistry and was for decades exposed to many organic chemicals including benzene and carbon tetrachloride. They were identified in the 1970's as carcinogens and exposure was reduced at that time. However, one can assume the genetic damage was already done and it took two decades for the diseases to surface. -- I support the right to keep and arm bears.