Mr. Enes Varupa is a full-time student in their third cycle of studies at the International University in Travnik, Faculty of Polytechnic Sciences, studying in the program of "Energy efficiency and renewable energy sources" He holds a Master's degree at the International University in Brcko. Degree obtained: Master of renewable energy sources and energy efficiency. The topic of the paper: "Energy efficiency and renewable energy sources of Bosnia and Herzegovina in the face of the challenges of global changes"