All projects that meet the requirements can participate in the olympiad. The criteria established by the workgroup can be found under Coordination regulations.

To keep the olympiad interesting and not to limit the students and teachers to one specific topic, INESPO has chosen to define the project in broad terms. Each of the five categories can be broadly approached. The selected categories are:

· Environment & Chemistry

· Environment & Physics

· Environment & Biology

· Environment & Geography

· Environment & Social/Civics

A project olympiad means that students work out their ideas on paper which is also followed by a  concept e.g. model or design of the solution. The result for the most innovative, creative idea which can ensure for a solution of environmental problems, could be a miniature design or a collage. During the event on the olympiad exposition days on June 9 (national), 10 and 11 (international) the project participants must be able to explain, defend and serve their design both in theory and in practice. If necessary, participants may request audiovisual support. The language is in English and the organization does not provide a  translator.