Under the patronage of the Custodian of the Two Holy Mosques King Abdullah bin Abdulaziz Al Saud, the 3rd Gulf International Forum and Exhibition for Environment and Sustainable Development will start its activities at the Hilton Hotel in Jeddah on Sunday. Organized by the Saudi Environmental Society under the title of "Green Economy, Social Responsibility.", the three-day Forum is supervised by the General Presidency of Meteorology and Environment Protection. A huge attendance of international and domestic environmentalists, economists, experts, ministers and specialists in addition to 50 speakers will participate in the Forum to discuss the environmental conditions and developments taking place in the world in this regard.