Opinion of the European Economic and Social Committee on:the Proposal for a Council Decision concerning the conclusion, on behalf of the European Community, of the Stockholm Convention on Persistent Organic Pollutants,Proposal for a Council Decision concerning the conclusion, on behalf of the European Community, of the 1998 Protocol to the 1979 Convention on Long Range Transboundary Air Pollution on Persistent Organic Pollutants, andProposal for a Regulation of the European Parliament and of the Council on persistent organic pollutants and amending Directives 79/117/EEC and 96/59/EC(COM(2003) 331, 332, 333 final — 2003/0118-0117-0119 (CNS))