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Urban green space can be viewed as a preventative public health measure. Nature contributes to health through disease prevention, disease management, and well-being (physical, mental, and social) promotion. Those contributions are based on improvement in health determinants. Nature and green spaces have been related to more physical activity, restoration and less stress, more social capital, and ecosystem services such as better air quality, less traffic noise, less heat island effects, more biodiversity, among others. Nature, vegetation, and green spaces have also been associated with better mental health, immune system, metabolic system, pregnancy outcomes, reduced cardiovascular disease, and premature mortality. This chapter presents the connections between nature and health, describing how nature impacts key health determinants, how those health determinants are associated with health outcomes (i.e. diseases, injuries, deaths), and provides examples of urban nature interventions that have been related to public health.

The purpose of this chapter is to review and synthesise the available evidence for the health benefits of walking. It follows a non-systematic evidence review and finds that the evidence base for the health benefits of walking is growing. Increasingly we are finding strong evidence for the beneficial effects of walking for both individuals and populations. More evidence is required on how to better understand the health outcomes associated with walking and how to promote long term increases in walking behaviour. Systematic reviews of specific health benefits remain rare. Walking should be promoted in all population groups regardless of age or sex. There are currently few existing integrative syntheses of the physical and mental health outcomes associated with walking and this chapter aims to help fill that gap.