Ray and shark species in the Adriatic Sea are threatened with extinction. Biologists have found high levels of heavy metals in the water and suspect that illegal dumping is behind the problem.
On this week's eco@africa, we meet a group rebuilding a national park in Mozambique, visit a vertical farm in Germany and see how Cameroon's biogas man is helping rural cookers save their environment.
Researchers along the eastern coast of the Adriatic Sea are diving deep to try and find out what is killing local shark and ray populations.
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