Environmental Education is essential to promote awareness and facilitate the development of environmental citizens. To contribute to the enhancement of environmental awareness, Iceland, Serbia, Bosnia and Herzegovina, and Romania have collaborated in joint educational projects which aim at building capacities on sustainable development, delivering environmental teaching lectures, and developing open educational resources. This article presents past and ongoing collaborations between the mentioned countries, assesses the status of environmental education, and highlights the benefits of international collaboration. For this purpose, information on environmental courses in representative universities from each country was collected, SWOT analyses were performed in each country, and a survey among potential students was carried out. The presented analysis reveals that international collaboration raises environmental awareness and increases the likelihood of becoming environmental citizens.

The CuSbS₂ exhibits adequate properties as absorber material in solar cell applications. This paper describes the defect chemistry of the CuSbS₂ using lattice reactions combined with electroneutrality conditions and equilibrium constants for each intrinsic defect formation mechanism. From the proposed reactions the conductivity type of the material is indicated: ionic conduction if the deviation from molecularity is the predominant defect formation mechanism and mixed ionic-electronic conductivity in the case of a deviation from stoichiometry, and in the case of the simultaneous occurrence of a deviation from molecularity and from stoichiometry

Advanced wastewater treatment targeting water reuse is currently an important research topic and the heterogeneous photocatalysis processes represent potential candidates. Most of the photocatalysts are aqueously stable metal oxides as TiO2 or ZnO; however, their use is limited due to the processes costs as these oxides are wide bandgap semiconductors that are activated only by UV radiation. Many alternatives are investigated to develop VIS- or solar-active photocatalysts among which most effective proved to be the diode type composites that associate the n-type semiconductor (TiO2) with a p-type semiconductor with lower band gap as CZTS or CIS. The challenges raised in developing thin films photocatalysts of diode type are discussed considering the advanced treatment under VIS and simulated solar radiation of a wastewater polluted with methylene blue (standard pollutant). Further on, new composites of TiO2 – Graphene oxide are presented considering the same application