With colon and prostate cancer being on the rise in men, what are ways to combat and prevent this?

Wrong statement. Colorectal cancer incidence and mortality for both men and women has been going down since the 80's, partly due to screening colonoscopies that detect and remove polyps before they get to become cancer. Prostate is a more complex issue because we are learning to discern which ones need treatment and which don't. That said, neither its incidence nor its mortality are rising.