Sea Water for Honolulu Air Conditioning

Here’s a neat, practical idea: Honolulu is going to draw in sea water for air conditioning. The system “will reduce Hawaii’s consumption of oil by some 178,000 barrels a year and cut greenhouse gas emissions by 84,000 tons of carbon dioxide annually.”

These are small sums, but if lots of coastal cities did this all around the world, and on a bigger scale than now envisioned in Honolulu, it would make a substantial impact.

And what if the suction system could be driven by wave energy?