Today in the morning there was a dense fog in my area. Cars were moving very slowly, because it was impossible to see anything! I thought also about planes at the airport that were to depart at that time. Probably flights were cancelled or shifted and many people had to change their plans. Maybe such a device could be invented - to dissolve fog?? Maybe something drying the air in the areas needed. In that case it would be possible to orient yourself safely on the roads, and flights would not be postponed because of the fog.