This report summarises the results of the research program Environmental studies during 2006. A pilot study has been performed concerning environmental security as a new research area. The Swedish initiative, LOI R&T Environmental Group, organised a conference on defence environmental issues in Erding, Germany. International cooperative meetings have been held with Norway, Finland, France, the Netherlands and Canada. Questions discussed have been environmental impact from energetic materials, environmentally friendly ammunition and noise. Within the project for developing sampling strategies for environmental risk assessments a technique named ROTAS (Rapid onsite toxicity audit system) has been established. The climate chamber has been adapted to investigations of contamination transport in soil in a lysimeter. Investigations concerning corrosion, leaching and dispersion of ammunition lead in soil has begun. During 2006 additional resources were temporarily allocated to the project for health risk assessment. Those investigations have dealt with the special constrictions valid in conflict and catastrophic areas and have been directed towards air pollution. In the project Environmental life cycle aspects of ammunition the processes for demilitarization are studied. In the project a survey will be performed regarding how research results more effectively could be used and how processes could be changed to reduce environmental impact and cost. The project on the use of life cycle assessment methods in the procurement of military material has been finished after three years. A data base for materials in ammunition has been developed. Studies have been performed on how Life Cycle Cost (LCC) is used and how environmental data are taken care of in LCC analysis. The project has been documented in a reference manual and in the manuscript of a doctoral thesis