Manama, Dec. 16 (BNA): The Ministry of Oil and Environment held a national event on the occasion of the Kingdom of Bahrain's celebration of its National Day and the 26th anniversary of His Majesty King Hamad bin Isa Al Khalifa’s accession to the throne and the accompanying national events. Dr. Mohammed bin Mubarak Bin Dainah, Minister of Oil and Environment and Special Envoy for Climate Affairs, attended the event. A.S, Z.I