The methods developed in the framework of the project were applied in regular monitoring programmes, as well as in studies connected with pollution of the environment with microelements and natural and artificial radionuclides. Methods for characterisation and identification of radioactive waste were developed and will also be used for control of the illegal trade in radioactive materials across borders, as also demanded by the international community. Neutron activation analysis was used in basic and applied studies connected to cycling of trace elements, studies of their toxicity and/or essentiality in the biosphere. The investigation of nuclear parameters allows better accuracy of results to be obtained by k0 NAA method in organic and inorganic matrices. The technique was used for verification of other routine measurements and analysis of reference materials. The k0-standardisation technique of NAA allows multielement non-destructive determination of many elements in different samples such as particulates usedfor monitoring of contaminated air, river sediments and industrial sludge, as well as samples from the pharmaceutical and metal industries. It was also used for determination of Cu and Fe in historical documents. EU directives require control of radionuclides, essential and toxic elements in food, so methods for the determination of uranium, thorium, vanadium, selenium, arsenic and iodine were developed. The selenium concentrations in some Slovene foodstuffs and Se status in the population were investigated. Concentrations of Se and iodine in infant formulae and food supplements, and of vanadium in food additives for sportsmen were quantified. Iodine, vanadium and some other essential elements were also determined in some human tissues and body fluids. Radionuclides and trace elements pollution were investigated in the environment by means of biomonitors. These results could be used by local as well as national authorities in the preparation of legislation connected with environmental policy and for remediation of contaminated areas.