Prince Turki bin Nasser bin Abdulaziz, President General of Meteorology and Environmental Protection concluded his visit to Tunisia today, after he headed the fourth conference of environment ministers in Muslim countries, which concluded its work last night, in the Tunisian city of Hammamet. At Tunis-Carthage International Airport, Prince Turki bin Nasser bin Abdulaziz was seen off by the Saudi ambassador to Tunisia, Dr. Abdullah bin Abdulaziz bin Muammar and a number of senior officials of the Tunisian Ministry of Environment.