While ignorance might be bliss, a large number of surveyed Americans pushed back on it when it came to a link between a food staple and increased cancer risk. What's happening? SciTechDaily reported on a national poll of 2,200 people that revealed nearly half of respondents weren't aware that consuming processed meats heightens the threat of colorectal cancer. The Physicians Committee for Responsible Medicine and Morning Consult's February surv…