[en] Poland is rich in deposits of brown coal applicable for large-scale industry. These deposits are estimated at about 13.5.10⁹ tons. In the near future, one-half of the electric power produced in Poland will be generated by power plants using brown coal. As a result, the yearly burden of the environment in Poland will amount to about 15.10⁶ tons of ashes and slag, and about 0.79.10⁶ tons of fly ash emitted into the atmosphere. Concentrations of radioactive elements in wastes following from the use of brown coal may in some cases be as much as 12 times higher that occuring from combustion products of lignite coal. Distribution of these wastes to the environment affects the population, through inhalation of fly-ashes, consumption of radioactively contaminated products and through living in dwellings constructed of building materials produced using industrial wastes. In order to determine the concentrations of ²²⁶Ra, ²³²Th and ⁴⁰K in brown coal and in products of its combustion, the method of identifying these elements through gamma-spectrometry has been prepared. Concentrations of ²¹⁰Pb and ²¹⁰Po will be determined using the method of electrodeposition on metallic silver, which has been tested in the laboratory. (author)