“Think Globally and Act Locally ” is a project based on the idea of small local activities that analyse local problems and help global direction and sustainable development. We focused on the “butterfly effect” theory, where small things can not only change attitudes towards environmental issues, but can also affect the whole approach. The project involved 4 partner schools from Slovakia, Greece, Poland and Italy. Within the countries of EU, there were 15 willing teachers and 400 pupils aged 6 – 14, who were getting to know each other’s culture, customs with emphasis on environmental issues. Besides the involved teachers and pupils, the Department of Ecology and Environmental Sciences of the Constantine the Philosopher University in Nitra, Tekov Museum and other organizations participated in the project. During the first project year participating schools introduced and presented their project plans in various ways. They measured the ecological footprint of pupils and members of the project team, created environmental calendar, logo and mascot of the project and installed project boards. Coordinating country organized the seminar on the technical terminology used in the project. At the project meeting participants evaluated conceptual maps, created community gardens, observed urban and local problems in the cities and changes of landscapes in historical horizons, searched for endangered animals and plants and created the database of them. They analyzed the temperature measurements of each country and the various environmental impacts associated with the climate change. Literary, artistic and musical work of the involved pupils was presented. During Christmas time, countries exchanged Christmas postcards made by children from recycled material. Various information and communication technologies have been used to process and disseminate information. During the second year national teams dealt with the usage of energy, waste, black dumps and chemical analyzes of water and soil. They organized local environmental excursions, discussions and lectures on various environmental topics. They made the second environmental calendar focused on eco-days, evaluated the final eco footprint and a questionnaire to verify the impact of project activities on changing environmental thinking of pupils. Project teams carried out two educational activities for pupils from Slovakia and Poland, the aim of which was to expand their environmental actions and strategies in order to increase their environmental awareness. Meetings of teachers from participating countries have led to interesting results not only in the environmental but also in the multicultural field. The outcome of the Erasmus + project is Atlas of Environmental Education. The Atlas contains methodologies and outputs from all participating primary schools and the editor is PaedDr. Peter Varga, PhD., Teacher of coordinating country - Slovakia. Significant impact and long term-benefits of the project for other European schools are in the usage of the publication Atlas through the eTwinning portal.