Are GMOs (Genetically Modified Organisms) good or bad?

Supporters believe GMO foods are the next best hope for feeding the planet while critics believe that genetically modified foods are unsafe and are an underlying cause of many of the health and environmental issues in the U.S.

My youngest son is a student at Drexel University and is curious to learn more about how well people feel they are informed about GMOs and whether or not they are concerned about them.

Please help him with a research project by answering a few questions about GMOs.