Environmental impacts of organic agriculture and the controversial scientific debates

The environmental impacts of organic agriculture have been controversially discussed in the scientific community for many years. There are still conflicting views on how far organic agriculture can help address environmental and resource challenges, and whether its promotion is an appropriate policy approach to solving existing socioecological problems. So far, no clear perspective on these questions has been established. How can this be explained? And is there a "lock-in" of the scientific discourse? The aim of this paper is to retrace the scientific discourse on this topic and to derive possible explanations as to why environmental impacts of organic agriculture continue to be assessed differently. To this end, a qualitative content analysis was conducted with a sample of n = 93 scientific publications. In addition, expert interviews were conducted to verify the results of the literature analysis. Two main lines of discussion were identified: first, the extent to which aspects of food security should be included in the assessment of environmental aspects (thematic frame); second, the extent to which net environmental impacts or possible leakage effects because of lower yield levels should be considered (spatial frame). It is concluded that the polarizing debate mainly results from the often-binary initial question (is organic agriculture superior to conventional agriculture?). Further, aspects that have been insufficiently illuminated so far, such as the choice of reference units or normative basic assumptions in scientific sustainability assessments, should be given greater consideration in the discourse.