ISSN 2671-9274 Vol.7 No.6 / september 30 2019 Research Briefs KEI environmental effects and policy respose from the automatic invalidation of long-term un-implemented urban parks writing. hee-sun choi, joon gyu choi, ji young shin, han woom hong, ghang geun park, jung eun kang, gil sang lee the "automatic invalidation of long-term un-implemented urban and public facilities," which originated from the court's unconstitutional decision on the viola-tion of property rights in the 1999 constitution, has expanded into "conflicts" between various stakeholders and social problems. ◆ areas conidered to have a good natural envi-ronment within the city were selected as urban parks. if the automatic invalidation of urban parks is implemented a large number of areas could be annulled, causing significant environ-mental, social, and economic effects. ◆ therefore, this study aimed to investigate the automatic invalidation of urban parks, and the central and local governments' policies and reponses. futhermore, it examined environ-mental effects based on the automatic invlida-tion of urban parks in term of ecology, microcli-mate, thermal evironment, disaster prevention, and water circulation in order to identify policy measures to cope width the expected results. 1.analysis of details and trends for the auto-matic inalideation of urban parks the expected problems pertaining to urban parks were caused by radical limits of the park green space policy, which focused on sevuring as great an area as apossible; lack of entral bovern-ment support; an inconsistent reponse policy; and promotion of an urban park policy centered on deregulation and parial development, rather than conservation and securing of parks. 01 kei research briefs