How possible is it to have a green - or environmentally-friendly - Christmas? That's what we've been looking at in our Green Christmas series on TheJournal.ie over the past few weeks.In this week's episode of The Explainer, our producer Aoife Barry steps into Sinéad O'Carroll's shoes and presents the show. She interviews reporter Dominic McGrath and Pat Kane of Reuzi.ie about how listeners can have a 'green Christmas'. They examine what exactly 'green' means, and whether big changes are necessary at your dinner table this 25 December.Our Green Christmas series is supported by Volvo, a car manufacturer which has pledged to be carbon neutral by 2040.