This document summarizes information about genetically modified foods, including what they are, potential dangers, positions of the US and Europe, commonly modified crops and their uses, labeling requirements in Spain and Catalonia's situation regarding GMOs. It discusses that genetically modified foods are derived from organisms whose DNA has been altered through engineering, outlines some potential health and environmental risks, and provides details about crops modified for traits like herbicide and drought resistance as well as nutritional modifications. It also notes labeling laws in Europe and Spain requiring labels to indicate transgenic content, and that Catalonia grows many GMOs like corn despite studies recommending a ban.