Content -- Preface -- Summary -- 1. Environmental Impact of Public Procurement -- 1.1 Product groups with high PP value -- 1.2 Environmental impact of product groups -- 1.3 Identification of product groups for further assessment -- References -- 2. Nordic Regulatory Instruments -- 2.1 Analysis of coach services -- 2.2 Analysis of taxi operations -- 2.3 Analysis of computers and related services -- 2.4 Analysis of cleaning products/services -- 2.5 General conclusions on regulatory instruments -- 3. Advantages and challenges of GPP and other instruments -- 3.1 Environmental importance of GPP -- 3.2 Other GPP advantages -- 3.3 Challenges of GPP -- 3.4 Summary of advantages and challenges of GPP -- 3.5 Methodology discussion -- References -- 4. Criteria for Efficient GPP -- 4.1 GPP assessment model -- 5. Consequences of GPP-Cases -- 5.1 New Server Centre in City of Copenhagen -- 5.2 Green procurement in Paratransit Service in City of Stockholm -- References -- 6. Conclusions and recommendations -- References -- Sammenfatning på dansk -- Appendix 1: LCA data and procurement volume.