Brazil has started to label food products that contain genetically modified organisms. The country introduced the legal requirement in 2004. However, products from the major meal producers, Cargill and Bunge, did not comply, the environmentalist group, Greenpeace, alleged in a legal challenge in 2005. Government agencies later supported the action and a federal judge ruled in September last year that the companies' GMO-containing products be labelled. The packaging of such produce has since borne a capital letter "T" (denoting transgenic) in a yellow circle. Greenpeace has hailed the labelling a "tremendous victory" and has set its sights on further labelling GM soybean-based products, such as margarine. Monsanto's glyphosate
-tolerant Roundup Ready product is Brazil's only commercially approved GM soybean line.