Not a new idea. Years ago, they tried something similar (google fog dispersal/airlines or fog seeding/airports, too many links to post) in the US, at Salt Lake City airport. The methods may have been used at other airports, as well. A small plane, I recall Bonanzas and Aztecs, set up for cloud seeding with dry ice, would fly the approach with spreaders turned on. The resultant particles would cause the moisture to precipitate out enough to clear the air for airline operation. It evidently only worked in cold conditions (fog turning to heavier ice crystals). I was under the impression that it was very temporary, but one source said the result could last for several hours. The program was eventually abandoned as too expensive, and I imagine the advent of Cat III auto-land made the seeding obsolete.