 The Left party in the Schleswig-Holstein parliament rejects the proposed tunnel, stating that it would be far more cost effective to optimise the Glückstadt–Wischhafen ferry.Alliance 90/The Greens have in their draft manifesto for the 2012 Schleswig-Holstein state election opposed further construction of Bundesautobahn 20 west of Bundesautobahn 21, instead proposing strengthening the rail links.The Greens also claim the tunnel is a bad plan, because it will "drown" in rising sea levels.