Rnz: Afternoons With Jesse Mulligan

We've been having lots of conversations about energy recently, and one area many of you have told us we should be talking about is geothermal. Geothermal Energy provides around 18% of our total electricity supply currently, but should we be looking to tap into this source more and boost that figure? Here to discuss, is Associate Professor John O'Sullivan from Auckland University's 'Geothermal Institute'.'