On the BBC news today there was an article about some boffins at Manchester university
Who are using graphene to produce fresh water
from sea water
. Apparently they use the graphene in 'sheets' stacked in layers, the water molecules go through the graphene, but not the salt
. They say this method is far better than the desalination plants in use at present and that the new method will help to provide plenty of water to countries that have shortages.
The scientist did say that it would be about 10 years before this new science can be put to use, but I think this must also benefit cruisers in the future too, especially since he said that the system could be as simple as pouring sea water into a graphene "coffee" filter and fresh water coming out the other end.