They can't, in that organic farmers risk losing their livelihood and certification if there's contamination from genetic engineering and genetically modified seeds. In addition, organic consumers expect a product that is not contaminated with genetic modification. So we have this situation where the issue of contamination is a burden that's borne by organic farmers, organic consumers, and also by farmers who are exporting to countries where these GM traits are not approved. Again, that's a question that needs to be debated. The organic sector needs to be valued for what it provides and its ecological services and products to consumers.
On March 7th, 2013. See this statement in context.