Where is your evidence that nothing has been sprayed yet?But that's not true. There is research into possibly doing geoengineering in the future. But nobody has actually sprayed anything yet.
And as I pointed out elsewhere. Patents are proof only of the possibility that something might work, or that it might be used. They are no evidence at all that it IS being used. There's plenty of patents for manned moon base related technology, yet no manned moon bases.
What's the smoking gun? Where's the actual evidence?