Watch: The Spanish sea saviours making waves in recycling
Meet Julen and Amaia, siblings and visionaries behind Gravity Wave. They're on a mission to clean up the Mediterranean Sea of..
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Gravity wave
Wave in or at the interface between fluids where gravity is the main equilibrium force
In fluid dynamics, gravity waves are waves generated in a fluid medium or at the interface between two media when the force of gravity or buoyancy tries to restore equilibrium. An example of such an interface is that between the atmosphere and the ocean, which gives rise to wind waves.
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