Has the huge rise in public awareness about plastic pollution diverted attention from an even more urgent environmental problem affecting the sea?
In Under the Surface, marine experts talk about how a changing climate is affecting Cornwall's basking sharks, plankton, seals and seabirds - but also looks at positive stories about local projects to restore the marine environment, which could help to protect us from the worst effects of climate change.
This is the first episode in the Cornwall's Climate Stories series, looking at climate change impacts and solutions in fields such as farming, health, waste, energy, transport and fishing.