More than two thirds of our planet is covered by the oceans, but there\u2019s still much to be uncovered about the role that these watery worlds play in climate change. \n \nBut recent scientific research claims that bottom trawling, a method of fishing that involves dragging heavy nets across the seafloor, emits about the same amount of carbon annually as aviation. Seabed sediments, which act as huge carbon sinks, are churned up, resulting in carbon dioxide emissions. So should trawling \u2013 commonplace around the globe because of its effectiveness \u2013 be reduced? And has the climate change impact of bottom trawling been exaggerated? \n \nPresenters Neal Razzell and Graihagh Jackson are joined by:\n \nDr Enric Sala, explorer in residence, National Geographic\nBarrie Deas, chief executive of the National Federation of Fishermen's Organisations\nMinna Epps, director, Global Marine and Polar Programme\nDomitilla Senni, senior campaigner, MedReAct\n \nProducer: Darin Graham\nSeries producer: Rosamund Jones\nEditor: Emma Rippon