New worries surrounding genetically modified organisms, or GMOs, are coming to the surface after the USDA approved new corn and soy seeds from Dow Chemical last month. On the table is whether the use of GMOs will create a new "superweed."

Mark Koba of CNBC reports that since the GMO seeds can tolerate the use of certain herbicides and pesticides, the "superweeds" are also developing a tolerance for the same herbicides and pesticides. The herbicide resistent weeds are reportedly costing farmers $1 billion in lost crops.

While those in the related industries are split, many companies are producing grain seeds that are resistant to herbicides, including Syngenta and Monsanto.

Read more here.