Stanford scientists have invented a way to generate hydrogen fuel from seawater using solar power.
They find a new way of separating hydrogen and oxygen gas from salt water.
Since the process also produces breathable oxygen, divers or submarines could bring devices into the ocean and generate oxygen down below without having to surface for air.
Hydrogen is an attractive option for fuel because it does not emit carbon dioxide.
Splitting water into hydrogen and oxygen with electricity is called as electrolysis.