HE Qatar's Chairman of the Administrative Control and Transparency Authority Abdullah bin Hamad al-Attiyah, who is also the President of 2012 UN Climate Change Conference (COP 18), and his accompanying delegation left Italy on Wednesday, after attending the Major Economies Forum on Energy and Climate (MEF). HE al-Attiyah was seen off at the Rome International Airport by HE Qatari Ambassador to Italy Sultan bin Saad al-Meraikhi.