The world needs a new source of energy, an unspillable source.

How much hydrogen fuel is necessary to bring two astronauts safely down to the moon and back into orbit?

I was wondering about this, since to get away from Earth it needs quite a big rocket, but how are the relations on the Moon with about six times less gravity and no atmosphere?
Thank you Lithiumdeuteride for this information! But then how much room-temperature hypergolic fuels would be necessary to bring two men safely down to the moon surface and back into orbit again?