To strengthen SMEs in the environmental technology sector more critical mass in knowledge and technology needs to be created, involving both RTD (research) and enterprises. Joint actions should include increased cooperation in export promotion. The work to deepen the cooperation between small and medium-sized enterprises (SMEs) in the field of environmental technology is mainly done through the Flagship Project ‘Develop deeper cooperation on environmental technology to create new business opportunities’. Achievements: Three sub-projects have been developed that share the aim of supporting Baltic Sea Region SMEs in the environmental sector. These create a strong critical mass in knowledge and technology, and joint actions with respect to export promotion. These projects (BioNutCut, DeepEntech and eFrontrunner) are all tackling different aspects of promoting environmental technologies with SMEs. Between them the projects include partners from all Baltic Sea Member States.