Environmental Security (i.e. the relationships between environment, security and development issues) is a field which has gained a growing interest during the last years from bodies such as NATO, EU, UN, OSCE and many others. Conflict prevention, as well as the transformation from armed conflict towards sustainable development, implies a range of challenges for e.g. the military sector. In many places of the world today the environment is under heavy pressure, affecting the security of man and the community of life, a situation further aggravated by the effects of climate change. A two-day workshop on "Environmental Security Concerns prior to and during Peace Support and/or Crisis Management Operations" was held in Umeå, Sweden, 25-26 November 2008. It was co-organized by the Swedish Defence Research Agency (FOI), the Swedish Armed Forces, the Swedish International Development Cooperation Agency (Sida), the Swedish Rescue Services Agency (SRSA) and the Folke Bernadotte Academy (FBA). The workshop was attended by 37 participants, including 11 presenters, from 9 countries. The workshop was part of Sweden's Partnership plan with NATO (Activity No. SWE.2879.1 in PWP 2008). The desired outcome from the Workshop presentations and scenarios was to achieve an increased understanding for the benefits as well as the challenges with a more integrated approach towards security, environmental and development issues. The intention was also that the workshop would facilitate valuable discussions among the participants regarding the main topics of the workshop as well as lead to improved routines regarding sharing of environmental information during international multifunctional operations.