I. Young people made environmental protection and the fight against climate change one of the EU’s top priorities (Eurobarometer 478). This tendency has been observed through the rise of young activists such as Greta Thunberg, which gave birth to a youth environmental movement that calls on governments to take concrete action to combat climate change. In the face of continuous environmental emergencies, the concern of young people is completely justified: the measures taken by authorities are still insufficient to guarantee their future. So they often want to turn to individual action. But how many young people know how to implement sustainable behaviours in their daily lives? How aware are they that by “thinking globally and acting locally”, they can make a difference?