Ocean currents conduct warmth and nutrients throughout the seven seas. We see how that works on a journey from the Caribbean all the way to northern Europe. Along the way, vortices form, which influence the currents in different ways.
Environmentalists have begun a court case in Oslo against Norway's granting of Barents Sea oil prospecting licenses to 13 firms. They say it is the first such lawsuit for a state violation of the Paris climate accord.
Plastic pollution and overfishing may currently be in the headlines. But rising CO2 emissions are also a key threat to the ocean that covers 71 percent of the planet, and a major challenge for future life on Earth.
New data shows peak sea ice cover this year broke last year's record low. Scientists say while this is partly down to natural fluctuation, it fits a clear trend linked to global warming.
Though we have come to expect pollution in the seas and oceans that border densely populated areas, what about the world's more remote waters? Artist Carol Devine went to find out.
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