This paper presents and discusses results from LCA studies for the commercially important bio-based polymeric material - poly (lactic acid); petrochemical - low density polyethylene and new packaging material - polyethylene with oxidizing additives. During this study only 2 aspects - the energy used and greenhouse gases exhausted have been studied and calculated for first and second life cycle stage (materials production and processing). Summarized results testify that the greatest negative burden on environment gives oxo-PE, since oxo-additives promotes fragmentation of PE and excludes recycling. Additionally to energy use, another aspect is: metal ions – one of degradation product of oxo-PE - causing the soil contamination and threaten human health. PLA packaging material presents the most appropriate long-term development outcomes considering energy use and greenhouse gas emissions.