Brussels, 06/03/2007 (Agence Europe) - In a letter to EU heads of state, the president of the European Wind Energy Association (EWEA), Arthouros Zervos, urged the European Council to introduce an overall binding target of 20% of the EU energy supply to be provided from renewable energy sources by 2020: 'In its recent conclusions, the Energy Council endorsed this 20% target but did not reach agreement as to whether it should be binding or indicative. In resolutions passed on 14 December 2006...