[en] Shale gas exploitation is the cause of many social protests. According to the protesters gas extraction technology threatens the environment: it consumes huge amounts of water, creates danger of poisoning drinking water, the formation of toxic wastewater, air contamination, noise, etc. Hydro-fracturing fluids could also leach radioactive isotopes e.g. uranium from the rock. The upper content of the main elements found in examined back flow fluids in Poland are the following: chlorine: 100.00 Kg/m"3, sodium: 40.00 kg/m"3, potassium: 0.90 kg/m"3, lithium: 0.15 kg/m"3, magnesium: 2.00 kg/m"3, calcium: 20.00 kg/m"3, strontium: 0.80 kg/m"3 and cesium: 0.06 kg/m"3 while the upper content of trace elements are the following: uranium: 3.5 g/m"3, lanthanum: 12.4 g/m"3, vanadium: 1.3 g/m"3, yttrium: 1.3 g/m"3, molybdenum: 2.0 g/m"3 and manganese: 9.7 g/m"3. The recovery of uranium, and other valuable metals, from back flow fluids will reduce an environmental impact of hydro-fracturing process. This poster details the treatment of back flow fluids in Poland allowing rare earth elements and uranium recovery