During our research we learned that the first logo of the Shell company was a mussel. Hardly recognizable, it was changed into a scallop shell. We also learned that around 1880 the Samuel brothers took over the business from their father, who was a London antique dealer specializing in the import of decorative shells, and it was twelve years later that they went into the oil bu- siness. The name Shell was therefore chosen in honor of their father.

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We found this story very interesting. And today, ironically, Shell has the name of a shell but nevertheless participates in the destruction of biodiversity, in the destruction of these shells. Starting from the mussel and the unlimited resource of mussel waste that the restaurants around the school offered us, we decided to carry out experiments around it trying to understand the effects that different chemicals could have. on her. How a small amount of liquid could have important effects on the living? The same way the petrochemical industry would on marine environments.

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The mussel (Latin: mytilidae) is a bivalve mollusc. Present throughout nor- thern Europe and particularly in the waters of the North Sea, it plays an important role as a filtering organism. This contributes to the purification of water by fixing metals in its shell, reducing the turbidity of the water, while improving the supply of plankton. It has indeed been shown that a bed of mussels, although it consumes plankton, releases such a quantity of bio-as- similable nutrients into the environment that it seems to be able to produce more plankton than it has consumed. For these reasons, mussels, like oysters, are classified as engineer species.