A new Hawaiian green project proposes to cool down buildings with seawater rather than fossil fuel-based a/c units.Honolulu Seawater Air Conditioningwill pump cool water (about 45° F) from 1,600 feet below the ocean waves. The water will travel through a pump system to an onshore station where it will cool fresh water that circulates in a closed loop through customers’ buildings in downtown Honolulu.