Ethical vending machines love small change

A French company has developed a vending machine which accepts those 1, 2 and 5 centime coins – known as pièces rouges - which we all collect but which seem to have no value. 

Their machines, called Les Petits Prix au Grand Coeurs, sell low-cost ethical snacks and can be found in shopping centres, railway stations, and university campuses throughout France. 

Randolph Mas, one of the founders ...

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