The forthcoming enlargement of the European Union poses a major political, economic and ecological challenge for the EU, the Member States and the Candidate Countries. One of the last and most difficult chapters to be discussed in the accession negotiations is the agricultural chapter of the aquis communautaire. The presentations and additional background information of the international workshop entitled "EU Enlargement: Impact of the Common Agricultural Policy (CAP) on Environment and Nature" that took place on 4-5 September 2001 in Bonn have been published in the BfN-Skripten