A quarter of a century has passed since the beginning of the Hydrogen Energy Movement. Over the past 25 years, there have been accomplishments on every front - from the acceptance of the concept as an answer to energy and environment related global problems - to research, development and commercialization. The Hydrogen Energy System has now taken firm roots. Activities towards the implementation are accelerating. (C) 2000 International Association for Hydrogen Energy. Published by Elsevier Science Ltd. All rights reserved.