The Edinburgh Declaration on Reactive Nitrogen. Declaration agrred by participants of the international conference ‘Nitrogen and Global Change’, held in Edinburgh, Scotland, on April 11th to 14th, 2011.
Historical trends and levels of nitrogen (N) budgets and emissions to air and water in the European Union and the United States are markedly different. Agro-environmental policy approaches also differ, with emphasis on voluntary or incentive-based schemes in the United States versus a more regulatory approach in the European Union. This paper explores the implications of these differences for attaining long-term policy targets for air and water quality.