With the battle against climate change never far from many of our minds this week, 6 years on from when Brainwaves first visited, Pennie Latin returns to the Flow Country in Caithness and Sutherland to remind us how that much-maligned, but globally rare, feature of the Scottish landscape: the peat bog might be crucial as a carbon sink. Because it is now deemed so precious a group called ‘ The Peatlands Partnership’ has been formed with the aim of applying to get the Flow Country designated as a UNESCO World Heritage Site. If it successful then the area will rank alongside the Grand Canyon and the Great Barrier Reef as one of the most important natural sites in the world but, could this precious landscape itself be in danger of the effects of climate change? We'll be discovering how new research hopes to find out.