The demand for organic fruit and vegetables is growing significantly, but updated knowledge is needed about the climate impact of production of organic vegetables. For organic vegetables grown and harvested in greenhouses, there is another challenge. New EU regulation means that in the future, production must take place in open systems, i.e. with direct access to soil. The question is how this will influence the carbon footprint - and the leaching of nutrients to the environment? Researchers from AU, in collaboration with the industry, are looking into these questions within the framework of the ClimateVeg project.