The paper concerns the use of limit value of siliceous fly ash content in concrete structures, with the application of various types of cements - based on the current standards and taking into consideration the requirements concerning current exposure classes. The conclusions were based on a review of literature, the results of scientific research, conclusions from expert opinions and buildings and structures supervision reports. In summary, it has been concluded that the use of limit content of siliceous fly ashes may result in negative changes in the properties of composites, which should be ruled out or confirmed by appropriate tests, taking into account the precisely defined composition of concrete, cement and the applied additives and admixtures. It has been emphasised that the problem concerns composites with the increased and limit values of fly ash content, especially as regards cements with the lowered content of clinker and high content of additives and admixtures (affecting the physical and mechanical properties of cement composites). Attention has been drawn to the need to modify the exposure classes, to focus on the requirements concerning the properties of concrete and not the composition - in order to achieve the expected durability.

Fine particulate matter ( PM) air pollution is one of the main environmental health problems in developed countries. According to modeling estimates the PM,, concentrations in Poland arc among the highest in Europe. In this article we focus on exposure assessment and estimation of adverse health effects due to PM, air pollution. This art i ck consists of two parts. The first part, we discuss the main methods used to estimate emission-exposure relationships and adverse health effects due to PM, air pollution. In the second part, we present an assessment framwork for Poland. We illustrate this framework by estimating the premature deaths and change in life expectancy in Poland caused by anthropogenic. primary PM,, emissions from different European countries, and, in proportion. the premature deaths in different European countries caused by primary PM,, emissions from Poland. The PM,, emissions were evaluated using the inventory of the European Monitoring and Evaluation Programme (EMEP). The emission-exposure relationships were based on the previously published study and the exposure-response functions for PM,, air pollution were estimated in expert elicitation study performed lor six European experts on air pollution health effects. Based on the assessment. the anthropogenic primary PM, from the whole or Europe is estimated to cause several thousands of premature deaths in Poland, annually. These premature deaths arc both due to PM, emissions from Poland and transportation of PM,, from other European countries. both of these in almost equal parts. The framework presented in this article will be developed in the near future to a full scale integrated assessment. that takes into account both gaseous and PM air pollution.