Urban Green Coverage: Importance of Green Roofs and Urban Farming Policies in Enhancing Liveability in Buildings and Cities—Global and Regional Outlook

Green urban coverage (green roofs, green walls and urban farming) has been extensively used in many countries around the world to offset the heat-related problems in cities resulting from severe climate change events. Rapid urbanization and population increase contribute to increasing urban heat island effect (UHIE) and climate change in megacities. Hence, utilizing urban green coverage can assist in reducing CO2 emissions and enhance air pollution in megacities. This chapter presents a review study on the policies and laws regulating the design and implementation of green roofs internationally and regionally. The chapter also highlights and discusses policies’ types enacted for implementing green roofs in Europe, North America, South America and Asia as well as Australasia and MENA region. Examples of green roofs, green walls and urban farming are presented and discussed.