A new Canadian study suggests women working in certain industries appear to have a higher-than-normal risk of developing breast cancer. The study says women working with automotive plastics and in food canning operations are roughly five times more likely to develop breast cancer before menopause than women who do not. Women working in tooling, foundries and metal-related manufacturing have nearly double the risk of developing breast cancer as other women. And women working in bars and gambling facilities are more than two times more likely than other women to develop breast cancer. The study was the result of a multi-year…