BOC pumped more than 5,500 cubic metres of helium into the canopy â€“ enough to lift two three tonne elephants into the air.
If you already subscribe, please sign-in now
To access hundreds of features, subscribe today! At a time when the world is forced to go digital more than ever before just to stay connected, discover the in-depth content our subscribers receive every month by subscribing to gasworld.
Don’t just stay connected, stay at the forefront – join gasworld and become a subscriber to access all of our must-read content online from just $310.