Energy Observer, the first hydrogen vessel in the world which emits no greenhouse gases or fine particles was pictured sailing off the coast of the Swedish capital, Stockholm on Tuesday. (Photos: VCG)

The high-tech vessel will stay in central Stockholm from May 24 to June 2. It is part of a project aimed at finding new solutions for the energy transition.

Powered by renewable energies and hydrogen, Energy Observer has traveled over 20,000 km within two years, with the wind propelled wings maximizing its energy autonomy.

The vessel is on a global voyage starting from 2017 to 2022, with 50 countries expected to be visited along the way.