EN
Over the past years, several studies have focussed on environmental interactions of model transgenic crops, e.g. oilseed rape, Brassica napus, in different eco-systems on North-America and Europe.Based on the experience with field releases of genetically modified higher plants, the data requirements for such requests were adapted in Europe. In other cases, e.g. in the USA and in UK, the requirements for certain crops were streamlined, covering different traits.In this respect, the step-by-step, case-by-case approach allowed to identify relevant environmental issues, thereby creating a comfort level of "familiarity".With the acquisition of familiarity, a basis is created for focussed risk analysis, which is now leading to the first commercial introductions of geneticaly modified crops.