Collisions with ships, noise and water pollution, giant fishing nets: these are just some of the dangers that threaten harbour porpoises in the North Sea and the Baltic Sea.
But some scientists and environmentalists are working to save them.
Collisions with ships, noise and water pollution, giant fishing nets: these are just some of the dangers that threaten harbour porpoises in the North Sea and the Baltic Sea.
But some scientists and environmentalists are working to save them.