The aim of this project is to share/compile the advances of our ERASMUS+ CIRO. The three schools working on the project will use twinspace as a way to spread what we develop in our lessons with the help of the partners. We will develop e-twinning in different phases that will follow the process of our CIRO project. Key words such as Europe Think green, hydrogen, natural resources, renewable energies, sustainability will be essential for our etwinning project. We will concentrate on the possibilities of hydrogen, learn how electrolysis works and find out how a fuel cell creates electrical energy.