Chemical warfare. These bombers are carrying a chemical called "Dihydrogen Monoxide" or DHMO. What effect does adding a chemical containing Hydrogen and Oxygen to fires have?
Why isn't Trump talking about this Canadian chemical attack?
I know that there is no fresh water available and that getting the fire under control takes priority, but isn't dropping seawater on everything ensuring nothing will grow again for a long time?
A lot of what is burning is mostly just weed/brush over hard soil that doesn't get much water anyways, I don't think it would permeate deep enough in the soil to really "salt it".
You would need a lot more salt than that to significantly damage the ecosystem. For example, many roads are salted all winter, it does impact local ecosystems, especially waterways, but it doesn't comepletely kill them in most places. Plus a lot of the ash from the fires can be quite nutritious for plants which can help with recovery.
I live in an area which has seen quite a few wildfires, and everytime they are put out with these planes using sea water. Never stopped anything from growing back, and it does grow back very fast !