They are called Dub 20 and Dub 30. They are the latest large data centres to be opened by the Taoiseach in Arklow in Co Wicklow.  They claim to be the most sustainable data centres in Ireland and will feed almost as much energy into the grid as they will take out.  But the planning process took 7 years and a trip to the High Court. Newstalk's Alex Rowley caught up with  Graham McWilliams, co-founder and Chief Operating Officer of Echelon Data Centers and began by asking him about the green credentials of Dub20 and 30 .