This is the second year of an Erasmus+ KA2 project which, on his 1st year, was only able to be carried out through activities thanks to Twinspace, because of the COVID sanitary crisis. The project involved 5 schools from 4 European countries (Italy, Lithuania, Slovakia and France with 2 high schools from Guadeloupe). The project, which was interdisciplinary, concerned the 2nd degree, bringing together pupils from 10/11 to 17 years old. The goal of the plurilingual project (English - Italian - French) “What a waste!” was to make students aware of environmental protection, sustainable development and environmental challenges. The 6 partner schools are based in Slovakia, Lithuania, Italy and France overseas territories.