Environmental noise pollution, a form of air pollution, is a threat to health and well-being. The primary aim of this study was to determine noise pollution in the urban part of the city of Banja Luka in Jovana Dučića Street (Republic of Srpska, Bosnia and Herzegovina (BiH)) by evaluating noise levels in the street. The aim of this research is also to compare the measured noise levels in the street with legislation. The measured values exceeded the level of noise allowed. Results indicated that noise level values in this area near health institution are alarming.

The modern way of life in our country and the world, in addition to creating the preconditions for a secure life of a man brought a series of problems the new era that were initially ignored, but the weather itself imposed as a key in the most important aspects of observation, because the indirectly or directly start affecting the health and life of people. A higher degree of urbanization, which is still striving often involves the expansion of cities and industrial zones at the expense of nature. In this article, the material contribution to police as well as control and repression bodies, in the protection and preservation of the environment.

Global Warming Potential – GWP is an agreed quantity which enables determination of an individual green-house gas effect on a global warming process. GWP quantity illustrates how a unit mass of an observed gas contributes to increase of global warming more than an unique mass of CO2, during certain period of time. The paper shows gases and substances resulted from combustion of aircraft engine fuel , so as their affect to the atmosphere. The paper is a short view of an ecological aspect of aeronautics contibution to climate changes, as well as to results of green-house gas emission.

The purpose of this paper is to show polymer waste as a raw material or otherwise usable material derived from a partial separation of communal waste. This paper describes the possibilities of polypropylene re-use through recycling with addition of glass powder, from the point of view of toughness caused by impact load. Standard test specimens, made of basic material – polypropylene, with addition of  0%, 5%, 10%, 15%, 20%, 25% and 30% of glass powder with granulation less than 0,5 mm, have been tested through six processing cycles. The measured values gave a possibility of forming patterns for changes of the observed material with different content of additives, through processing cycles, which can be helpful in further research and analysis.