About 5,000 activists marched through the German city of Bonn on Monday to protest against genetically modified food at the start of a UN conference to discuss risks linked to the technology. Campaigners, many waving colourful flags and banners with slogans such as "Biofuel Creates Hunger" and "Good Food Instead Of GM Food", walked and danced through the western German city. Some drove tractors and floats. "We are protesting for biodiversity and against the destruction of nature, against GM, for the protection of biodiversity," activist Amira Busch told Reuters Television.