Comparision of gas emission from antropogenic lakes as well natural lakes and peatlands in mead east part of Poland were studied in this paper. Preliminary investigations of the emission of greenhouse gases (CH₄, N₂O, and CO₂) performed in the area of Poleski National Park and in its wrapper comprised such objects as: anthropogenic lakes formed as a result of deformation of the land surface due to mine activity (Szczecin and Nadrybie), natural lakes of different eutrofication degree (Uściwierz weekly eutrophic, Piaseczno mezotrophic. Roztocze – eutrophic, and Moszne dystrophic) as well as peatlands surrounding the lakes Moszne, Orłowskie and Uściwierz. With the use of the technique of closed transparent chambers which were floating on the water surface of placed on the frames pressed into the soil, the air from the chambers was sampled at some lime intervals (30', 60', 90') to vacutainers, analyzed by gas chromatography, and the flux of the gases was calculated. Qualitative and quantitative evaluation of the emission of the greenhouse gases was performed in spring, summer and autumn 2001. Evaluated methane emission reached in the range from 0.4 Mg ha^–1yr^–1 in the lake of Piaseczno to 11.5 M Mg ha^–1yr^–1 in the lake of Moszne and from peatlands of the Poleski National Park was in the range 0.013-0.822 Mg ha^–1yr^–1.