ISTANBUL — The Turkish Energy Minister and a top economist will deliver speeches at the opening of Anadolu Agency co-sponsored, 20th International Energy and Environment Fair (ICCI), due to be held at the Istanbul Expo Center, for three days beginning Thursday April 24.Energy Minister Taner Yıldız will open the fair, and International Energy Agency Chief Economist Fatih Birol will deliver a speech during the opening ceremony. International energy experts will be talking on a variety of issues, including; renewable energy technologies, developments in the renewable energy market, operation and maintenance of power plants, nuclear power, natural gas and petroleum and financing of energy projects and energy law. ICCI is the largest energy and environment fair in Turkey attracting approximately 16 thousand local and foreign participants since it first started twenty years ago.