Hydrogen civilization (HyCi) conception is generalized. Some biospheric, noospheric and synergetic aspects of the HyCi-conception are analyzed. For the first time it is noted that the HyCi-conception includes two constituent, mutually conditioned parts: humanitarian-cultural part and environmental-industrial one. The most important possible stages of the transition to the HyCi have been indicated, including the important role of the world hydrogen movement, general public, international and regional organizations, parliaments and governments of the world countries. It has been emphasized that these global changes in humankind's life need a long period of time, humanitarian-cultural and legislative-economical self-regulation of the life of people and countries. Some modern times challenges of the IAHE and the World Hydrogen Movement are discussed. (c) 2005 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.