- Accessible Natural Greenspace Standard (ANGSt) (Natural England)
- Arboricultural Association
- Biodiversity in Urban Gardens (BUGS)
- Centre for Ecology and Hydrology (CEH)
- Centre for Urban Resilience and Energy (CURE)
- Department for Environment, Food & Rural Affairs (DEFRA)
- Environment Agency
- Green Infrastructure and the Health and Wellbeing Influences on an Ageing Population (GHIA) (University of Manchester)
- Green Infrastructure Partnership
- Greenspace Scotland
- Groundwork
- International Society for Arboriculture
- Irwell Management Catchment: Natural Capital Account and Ecosystem Services Opportunities Mapping
- Natural England
- Natural England and Greater Manchester Combined Authority ‘Urban Pioneer Strategic Plan’ (PDF, 2000KB)
- Natural Resources Wales
- Northern Ireland Environment Agency
- OS Greenspace Map
- Scottish Natural Heritage
- The Nature of Cities
- The Urban Imperative. Specialist Group of the International Union for Conservation of Nature
- Tree Council for Ireland
- UK UNESCO National Commission
- UNESCO
- UNESCO - Natural Sciences, People, Biodiversity and Ecology
- Urban Regeneration and the Environment (URGENT)
- World Health Organisation (WHO) Health Impact Assessment (HIA)
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