Shareholders of PepsiCo, Inc., the makers of Pepsi Cola products, will vote on whether to continue to use genetically-modified (GMO) corn syrup and other genetically-altered foods in their products.The resolution, filed by Harrington Investments, Inc., a Napa, California-based socially responsible investment advisory firm, is calling on Pepsi to stop using genetically-altered products until long-term safety testing has shown that they are not harmful to humans, animals, and the environment, and to label products containing GMO ingredients in the interim.