Brussels, 17/05/2004 (Agence Europe) - The Greens at the European Parliament have written an open letter to Foreign Ministers and Heads of State and Government with a view to the EU Foreign Ministers' discussion on the European Constitution in Brussels, on Monday. The letter proposes that the future Constitution be ratified during a single Europe-wide referendum (see above). Co-presidents of the Greens/EFA Group Daniel Cohn-Bendit and Monica Frassoni, Vice-President Pierre Jonckheer and...