Hydrogen is the most abundant gas in the Universe, and hydrogen-powered cars only emit water vapor. In principle, therefore, hydrogen could be a cheaper and cleaner fuel for our cars. But hydrogen remains too dangerous in its liquid form to take onboard enough fuel for a long journey. And so the race is on to find a way to store hydrogen at greater densities and at lower pressures.

Denis

Denis Loctier is a senior Euronews NBC science and nature correspondent, producer and presenter of the "Ocean" documentary series. Since 2001, he has produced TV documentaries on more than 150 international research projects and covered a variety of other topics, from international politics and military conflicts to economy and tourism. He holds a double PhD degree in philology and information and communication sciences.

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