Jsonview 링크 https://chrome.google.com/webstore/detail/jsonview/chklaanhfefbnpoihckbnefhakgolnmc?hl=ko
서울시 미세먼지 http://openapi.seoul.go.kr:8088/6d4d776b466c656533356a4b4b5872/json/RealtimeCityAir/1/99
