Prince Turki bin Nasir bin Abdulaziz Al Saud, General President of Meteorology and Environment Protection, Head of the Saudi Delegation to Meetings of the 19th Session of the Council of Arab Ministers in Charge of Environmental Affairs and Head of the Executive Bureau of the Council of Arab Ministers in Charge of Environmental Affairs, delivered a speech at the opening of the session held here today. In the speech, he focused on world environment issues such as climate change, biological diversification, desertification and other environmental issues in the world and called for unity in facing these challenges to protect the environment and achieve sustainable development. His speech came on the occasion at the end of his term as head of the Executive Bureau of the Council of Arab Ministers in Charge of Environmental Affairs.