A 4 year study of British researchers and industry reports massive and persistant contamination of fields, once planted with GMOs as well as the emergence of multiple herbicide resistant GM mutations. Apart from coexistence problems, the study found no evidence that the GM varieties were more harmful to the environment than other crops.</p><p><a href="http://news.bbc.co.uk/1/hi/sci/tech/4050475.stm">BBC: Field management is 'key for GM'</a></p><p><a href="http://www.foe.co.uk/resource/press_releases/new_study_highlights_gm_fe_29112004.html">Friends of the Earth: New study highlight GM fears</a></p><p><a href="http://www.hgca.com/cms_publications.output/2/2/Publications/Publication/Botanical%20and%20rotational%20implications%20of%20genetically%20modified%20herbicide%20tolerance%20in%20winter%20oilseed%20rape%20and%20sugar%20beet%20(BRIGHT%20Project).mspx?fn=show&pubcon=1805">Full BRIGHT report</a>