New technology will be available by 2030, not because it is required but because technological advances are always ongoing. Two research papers have been published since this paper was presented at the astronomy conference, both of which produced models suggesting that the cooling effect would be slight and would be limited to the northern hemisphere. With such differences of opinion, we won't know the full impact for at least five years. By then, with further research, the predictions will be more accurate.
I don't believe in the models. I believe in looking through the window to see what the real world is doing and taking the necessary steps to make the world a cleaner, safer place.