Brussels, 02/05/2007 (Agence Europe) - Meeting in Washington on Monday at the EU-United States Summit, European leaders (the President of the Council, German Chancellor Angela Merkel and the President of the European Commission, José Manuel Barroso) and the US President Georges W. Bush pledged in a joint statement to speed up the transformation of energy structures in the EU and the United States to tackle the triple challenges of energy security, climate change and sustainable development....