The ebb and flow of the tides creates maelstroms reaching as far as 5 meters down at Saltstraumen. The natural spectacle whips the sea water up to speeds of some 40 km/h.
Norway has confirmed it's planning to launch its first autonomous and fully electric cargo ship next year. The vessel will help to reduce carbon dioxide emissions by saving tens of thousands of truck journeys annually.
We tend to associate corals with warm, tropical regions. But there are also species that live in cold, dark, deep waters. What happens to these creatures as climate change warms the ocean and makes the water more acidic?
There's massive public worry about diesel car emissions these days - but the really big polluters are plying our waters.
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