District heating is where local homes and businesses get their heating from a single building in the area which itself gets that energy from renewable sources such as heat pumps or solar. Ireland has the lowest amount of renewably sourced heat in all of Europe. The Scandinavians are streets ahead of us. Copenhagen has 3000km of pipework for district heating - while Dublin has only 2.  But fear not only 2 weeks ago the very first district heating scheme was announced in Ireland and it's good news for my next guest who specialises in it having lived in Denmark for many years. David Connolly, chief executive of HeatGrid.ie and the Newstalk Green Biz person of the month with Repak joined Joe Lynam on the show.