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This paper presents an assessment of potential environmental impacts for eight planned non-hazardous regional landfills in Macedonia. Waste quantities for each waste management region and landfill capacities are estimated. Expected leachate quantities are calculated using Water Balance Method. Analyses and comparison of the likely landfill leachate per capita are presented, demonstrating that higher rates of leachate are generated per capita in waste management regions with higher annual sums of rainfall. An assessment of the potential landfill impacts on the water environment taking into consideration local geology and hydrogeology conditions is presented. Some general measures for leachate treatment that are in compliance with the modern EU standards are indicated. The goal of the study is to facilitate a better understanding about the sustainable waste management practices in cases of landfilling of municipal solid waste.

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The phenomenon Duvalo in the vicinity of Ohrid has always been subject of interest among scientist and the general public. All geological manifestations occurring at this locality are a constant challenge for anyone attempting to research or explain them. So far, some researchers consider this structure is representing a solfatara while others consider it a mofette or fumarole. There are even articles in newspapers stating it represents the only "active volcano" on the Balkan Peninsula. With the aim to clarify some important facts for the location and eliminate the multitude of arbitrary and unprofessional interpretations and information, within the frame of this article are presented results of analysis of all the available geological and geomorphological existing documentation for the phenomenon. Based on such detailed analysis with taking into consideration the character of its activity, the composition and the measured temperature of the gasses, geomorphological futures etc., the occurrence is classified as a "dry moffete". The presence of the H2S gas in mofettes appearing on non-magmatic regions is very unusual and requires further research. Therefore, at the end of the paper are presented the minimum required investigations which will help define the origin of gasses at the Duvalo occurrence.

Slope stability analysis in hard rocks is one of the most complex tasks in geotechnical engineering. It requires application of specific design principles in order to find a way to incorporate all uncertainties coming from geological, geotechnical, economic and social aspects. In the frame of this article are presented the basics of one approach that shows how is possible to link the acceptable level of risk with the values of Factor of Safety or Probability of Failure. The methodology is supported with some results from stability analyses performed for slopes on the access road to dam "Sveta Petka" in R.Macedonia and some other case histories. Based on these analyses, the article gives some new proposals in definition of acceptable (tolerable) level of risks using also criteria of probability of failure, potential loss of life and economic impacts.