evidence: The study found that cities in the north and west of Europe tend to have more green space than cities in southern and eastern Europe. The assessment looks at socio-economic and demographic inequalities in access to green and blue spaces in European cities. It also includes examples of green spaces that were designed to meet the needs of vulnerable and disadvantaged social groups.The potential for green spaces to boost our health and well-being is increasingly recognised, both in science and policy. Accessible green areas are especially important for children, the elderly and people with lower incomes, many of whom have limited opportunities for contact with nature. [...] Publicly accessible green areas form a relatively low share of total green space, estimated at only 3% of the total city area on average. Yet, this varies between cities, with cities such as Geneva (Switzerland), The Hague (Netherlands) and Pamplona/Iruña (Spain), seeing accessible green space account for more than 15% of the city area. [...] Across Europe, green space is less available in lower income urban neighbourhoods than in higher income ones, with differences often driven by the housing market, where properties in greener areas are more expensive. While the World Health Organization recommends that all people reside within 300 metres of green space, less than half of Europe’s urban population do. National and local guidelines vary across Europe and guidance on how to make access equal across social groups is rare.