sea water

A new green project called Honolulu Seawater Air Conditioning (HSWAC) proposes to cool down buildings with seawater, rather than fossil fuel-based air conditioning units.

The Lawrence Livermore National Laboratory has found out a greener way to desalinize sea water. It uses carbon nanotubes which have pores that are 100,000 times smaller than a human hair, and were able to determine the rejection mechanism within the pores. It could offer cheaper water to poor countries from Africa.