ABSTRACT: Geothermal energy is one of the renewable energy sources which are able to solve two basic problems of the mankind further development – energy supply and environmental pollution. Possible environmental impacts of geothermal energy sources utilization are described in the paper. The paper focuses on those, connected to overexploitation of geothermal resources, which might induct pressure drop in hydrogeothermal structures, microseizmic movements, landslides and degradation of natural surface features connected to occurrence of geothermal resources. Environmental impacts connected to normal – daily utilization of geothermal resources are also mentioned, as noise, heat, waste water, waste gases production, radioactivity and some other minor impacts. In the end, environmental benefits connected to energy production from geothermal sources are presented.