Brussels, 27/03/2009 (Agence Europe) - The adoption of a joint declaration between the EU and Ukraine on modernisation of the gas transit system continues to upset Russia to the point that it is threatening to review all its relations with the Union. Immediately after the international conference on 23 March in Brussels, Russia's energy minister had said he was disappointed about the fact that Russia had been left to one side. He also clearly stated that any project to modernise the gas...