Dear EarthTalk: Is it true that environmental factors could be playing a role in the increasing number of prostate cancer cases in the U.S. and elsewhere? -- Joshua Gordon, New York, NY
Prostate cancer is a growing problem for men in the U.S. as well as in other developed nations around the world. Some 40,000 American men lose their battle with prostate cancer every year—the only cancer more deadly for U.S. men is skin cancer. Age is the primary “risk factor” for developing prostate cancer. One out of every six American men over the age of 40 will develop prostate cancer, while four out of five over 80-years-old will get it. Of course, genes also play a big role. The American Cancer Society reports that a man’s prostate cancer risk doubles if his father or brother has suffered from the disease. Researchers believe a genetic predisposition accounts for as many as 10 percent of all cases of the disease in the U.S.