Answer:
Both inventions were done by teenagers at their times.
Both inventions claimed to help the environment Boyan slat's machine would clean up trash flouting in ocean. Duro - Aind adebola, Akindele Abiola, faleka oluwatoyin and Bello Eniola proposed power generation from urine that would not create carbon monoxide.
unfortunately, both inventions were also challenged by more established scientists and engineers.