"Our challenge is transformation. We need a global clean energy revolution -- a revolution that makes energy available and affordable for all," he told participants in the fourth edition of the World Future Energy Summit.

"This is essential for minimising climate risks, for reducing poverty and improving global health, for empowering women and meeting the Millennium Development Goals, for global economic growth, peace and security, and the health of the planet," he added in his keynote speech.

"You can lead this revolution, and in many ways, many of you are already doing so," he told participants to the fourth edition of the summit and exhibition, which has attracted more than 3,000 delegates.