Yes, and the result of this tampering doesn't inspire much confidence. I doubt humans understand what's actually going on. How can they come up with a solution when they don't even fully understand the problem? The problem of climate change is insanely complex with billions of variables.

Also, how can they possibly understand all the side effects of spraying aerosols into the atmosphere of a massive, highly complex planet which supports an incalculable number of living organisms? They didn't know that burning fossil fuels would lead to climate change when they started doing it, who is to say that spraying massive amounts of aerosols into the atmosphere will not lead to something else which they did not anticipate?

This proposed solution is akin flawed scientific practices of earlier times such as blood-letting or whacking people over the head with a stick to chase out daemons. At every point in history, people with fancy academic certificates have always been certain that they knew what they were doing and they've been proven wrong over and over.