"In my perspective, Nord Stream does not help diversification, nor would it reduce our energy dependency," Tusk told reporters in Brussels.
He added that the project would concentrate 80 percent of Russian gas imports on one route, it would also lead to Gazprom's dominant position on the German market by increasing its share to over 60 percent and dry out transit of Russian gas through Ukraine.
The Nord Stream-2 project, which plans to use the original Nord Stream pipeline for 86-percent of the route before branching off, could provide up to 55 billion cubic meters of direct gas supplies from the Russian shores through the Baltic Sea to the coast of Germany.
In September, Gazprom signed a shareholder agreement on the extension of the pipeline with the international energy companies BASF, E.ON, Engie, OMV and Shell.
