The establishment of green areas in urban environment for ecological sustainability is a strategy recognized in academics as well as in politics and governance. This thesis investigates how and to what extent various measures and interventions of increased urban green areas and their ecological benefits may contribute to ecological sustainability and improve urban life quality. In addition to a literature review of topic this thesis also contains an applied study of the new construction project “Södra Nyhamnen” in Malmö. The study shows that measures and interventions to increase urban green areas can contribute to locally enhanced biodiversity, possible better air quality, infiltration of storm water and retainment of storm water contaminations in soil instead of polluting of receiving waters. Shading, less heat radiation and wind protection, will also regulate the local climate. The study further shows that measures for urban green areas contributes to improvement of local urban environment, although it should primarily be described as environmental health improvement and only secondly as ecologically sustainable, as the measures consist of reducing or remediating measures with environmental health focus