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(subgeothermal, groundwater, heat pump, energy efficiency, eastern Serbia)
cal heterogeneity and a variety in aquifer systems and groundwater distribution. Thus, the region ischaracterized by the presence of formations withsmall groundwater reserves but also Mesozoic carbonate rocks, Tertiary or

longtime to come. There is also good potential for groundwater utilization from alluvial sediments and Neogeneformations in Intra-Carpathian basins. Regarding thetotal groundwater resources available there are somecontradictions

ConclusionsAmong the main advantages of subgeothermalenergy extraction from groundwater (temperature30°C or less) are:• Easy tapping (once the groundwater resource isproperly explored and defined);• Renewable energy resource which