Riyadh, Safar 29, 1436, Dec 21, 2014, SPA -- Prince Dr. Mansour bin Miteb bin Abdulaziz, Minister of Municipal and Rural Affairs patronized here this evening the 4th international conference on the environment of cities 2014 held under the logo "environment to enhance sustainable development of cities", organized by Riyadh Development Authority in collaboration with the Municipality of Dubai and the Arab Cities Environment Center. Addressing the gathering, the minister welcomed the experts and academicians taking part in the event, noting that his ministry is keen to support such activities aiming at upgrading the environmental situation of Arab cities amid the challenges facing them. --SPA 00:11 LOCAL TIME 21:11 GMT www.spa.gov.sa/w