Mini-submarines to gauge Lake Geneva pollution

Two mini-submarines that have filmed the wreckage of the doomed luxury cruise liner Titanic will dive into Lake Geneva to gauge its pollution levels, Swiss researchers said Tuesday.

Image: Lake Balaton in western Hungary from orbit

The Copernicus Sentinel-2 mission takes us over Lake Balaton in western Hungary. With a surface area of around 600 sq km and a length of around 78 km, this freshwater lake is the largest in central Europe.

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