Dear EarthTalk: As far as I know, genetically modified foods are not required to be labeled so. Why is this? Don’t we have a right to know what our food is made of? -- Rebecca Webster, via e-mail
Unbeknownst to most Americans, a majority of the processed foods available in grocery stores today are derived from genetically modified (GM) sources—whereby genes have been taken from one species and insert into another to obtain specific traits or characteristics. Given how new GM technology is—scientists first began tinkering with it in the 1970s but only recently began utilizing it on a wide scale across the food sector—the jury is still out as to whether such products can cause health or environmental problems.