The aim of this thesis is to investigate the possible differences between European and US American students, concerning their opinions about the use of genetically modified organisms (GMOs) in agriculture and in the food value chain. The research points on existing patterns or chains in student argumentation as well as on prevalent metaphors used in the discussion form. Basis of the analysis are protocols from student chat room sessions. The students are participants from an international course called global seminar. The thesis refers on data collected at a chat room session in summer semester 2015. It contains data of nine chat rooms where a total of forty students participated. Students, as future decision makers reveal their opinions in pro and contra discussions about genetic engineering. In order to organize a proper sequence in the discussion, six specific issues related to GMOs have been described prior to the chat. Data is subject of qualitative data analysis. The differences between European and US consumers in relation to their opinion towards GMO are well known. The analysis of US students expressions in the chat room data shows very similar results. Most US students strongly support the application of GMOs in any production process, whether it is for food or medical purpose. The analysis of European student statements shows mostly an opponent attitude in regards to GMOs in food production. The research reveals that European students perceive risks in connection to GM much stronger than benefits. Negative effects, weather they are of concrete nature or unknown risks jet not discovered negative side effects have been expressed mostly from European students. This indicates the presence of an uncertainty avoiding attitude and correlates also within previousely conducted research in literature. However despite some profound well-known differences between US American and European students, quite a few similar attitudes emerged.