However, the negative impact of our way of life on the environment has not stopped growing. Exploitation of natural resources to the limit, water pollution, soil contamination, loss of biodiversity, among other factors, have aggravated the environmental problems that must be resolved throughout this century. Faced with such challenges, schools and society have been making efforts to alert, sensitize, make known the reality, reflect and, above all, lead younger people to act, taking this challenge seriously. It was with these assumptions that students and teachers of some European countries  decided to engage in a European project that had everything to do with their intervention in environmental and sustainability issues. The Erasmus+ KA229 project, ECO Echo, has been developed with activities and virtual meetings, and between 22 and 26 November, mobility to Greece – Volos took place. The countries involved are: Portugal, Spain (Basque Country), Turkey, Greece and Estonia (coordinating country). These were days of hard work, with activities and moments of interaction, following all the sanitary rules to prevent pandemic contagion, but which resulted in success. All recognized that empathy and knowledge were present, the objectives proposed for this first stage, in presence, were achieved and the presence part was really necessary. Products made by all countries with recycled or reused materials were shared, two workshops were held in which each country designed its country's products or icons in simple, selected materials, prepared and applied a questionnaire on the attitudes of the population of Volos towards healthy and sustainable gestures, from a perspective of active citizenship (always accompanied by the Greek students in each group).