A RO filter could be submerged in deep seawater where the ambient pressure would purify water. Wave action pumps bring water to the shore.
A reverse osmosis filter submerged in seawater that is 2000 feet deep would collect purified water in an undersea reservoir. The fresh water could be transported to the shore by utilizing a series of wave powered water pumps. The fresh water could then be used for drinking, irrigation etc. or if enough volume could be pumped to a significant altitude for hydro-electric power generation.
What actions do you propose?
I propose building a system of desalinating ocean water through submerged reverse osmosis filters where wave powered pumps move the fresh water onto the land for irrigation.
Who will take these actions?
Governments of nations that have deep water near the coast such as Chile might install the proposed system to provide an inexhaustible supply of fresh water to the more arid parts of the country allowing for increased agriculture.
Where will these actions be taken?
Anywhere deep water exists near a coastline.
How will these actions have a high impact in addressing climate change?
Some GHG reduction benefit from the fresh water would be immediately realized as the new water source replaced whatever system was being used. The greatest impact would arise if the new supply of water were used to grow plants in a location where it was previously impossible to do so.
What are other key benefits?
Clean drinking water for people.
What are the proposal’s costs?
Initial capital outlay would be high and maintenance of a deep water system could prove to be difficult. Care would need to be taken not t damage fragile offshore ecosystems.
Build one now, if it works well build more.