Canada

The Canadian Cancer Society says drinking about three drinks a day could double the risk of developing cancer of the mouth, pharynx, larynx and esophagus, and increase the risk of colorectal and breast cancer by one-and-a-half times.

Brandon Purcell, the Canadian Cancer Society's advocacy manager of prevention and early detection, said research shows more than half of Canadians are unaware of alcohol's link to cancer.

"It's about the right of Canadians to know," he said.