By Sandra Knowler and Becky Rock ( September 1, 2016, 8:00 PM EDT) -- In the last few decades, the rate of global population growth has caused great concern about future access to reliable and sustainable food sources. Perhaps the most controversial response to these concerns is the increasingly common bioengineering of food to improve yield and resistance to disease, as well as reduce maturation time. These technological advances in genetically modified (GM) foods are undeniably impressive, but opponents nevertheless remain worried about the potential environmental and health effects....