The presented work is devoted to the analysis of electric energy production in photovoltaic power plant located in east part of Poland and estimation of pollution avoided due to the usage of solar radiation energy. Photovoltaic power plant consists mainly of silicon polycrystalline modules but in its experimental part thin film modules of three different technologies are also installed giving the entire power equal to 1.4 MWp. In 2015 the PV plant produced above 1.5 MWh of electric energy. Benefits of renewable energy use result in significant reduction of emissions that are harmful to people and other living species too.