UN Secretary General Ban Ki Moon visited the UNIDO International Centre for Hydrogen Energy Technologies on 31st May 2012. During his visit he attended a brief presentation by Dr. N. Lymberopoulos on hydrogen energy technologies and the contribution of ICHET in promoting hydrogen to the Developing World. He was then accompanied by Dr. J. Wetherilt in a tour of the labs and in test driving some of the hydrogen vehicles including a hydrogen forklift. His visit was made in preparation of the Rio+20 Summit which has alternative energies as one of its main topics. In his speech the UN SG expressed he was impressed with what he saw and reiterated the importance of sustainable energies to the UN. Mr. Ban Ki Moon was accompanied by his wife and a number of dignitaries including the Mayor of Istanbul and Consuls from numerous countries.