This report summarises the results of the research program Environmental studies during 2002. A dissertation, Retention and mobilisation of Trinitrotoluene, Aniline, Nitrobenzene and Toluene by soil organic matter, has been presented by Johan Eriksson at the section for soil science, dep. of forest ecology, SLU Umeå. A compilation has been performed of hydrogeological transport- and dispersion-processes useful for environmental risk assessment. A new method for analysis of newly developed explosives, capillary electrophoresis, has substantially shortened the time for analysis and decreased analysis cost. Initial toxicological tests with a new method which uses connective tissue cells from mice (929) placed on DNA-chip has shown promising results. Investigations on water fleas have indicated work environmental risks connected with the explosive CL 20. The possible regain and reuse of explosives as new products or parts in new products have been investigated. Available methods have been identified and their suitability for explosives that are of interest to Sweden have been investigated. Examples of suitable methods for flushing out explosives are water jet, laser treatment and cryofracture. Two available methods for regaining of explosives have been studied. A project concerning studies of how to take environmental considerations in the defence material acquisition process has been started. The project involves a doctoral student at the Royal Institute of Technology. The main problem studied is how can life cycle analysis and life cycle thinking be integrated into the defence material acquisition process? A case study in which life cycle analysis is used for a military product (ammunition for SV90) has started. A study of how environmental aspects can be included in life cycle cost analysis has also been initiated.