No doubt that reflecting our sun's radiant heat back into space cools out planet a bit.
Sort of like when you climb a ladder the earth's rotation slows a bit.
How much cooler or slower the earth is can be calculated but is probably inconsequential.
It's getting foolish to doubt or argue that human activity is causing climate change.
It is.
The argument is whether or not it matters or whether or not we can or should try to undo it.
BTW I have a favorite symbolic gesture for CA!
Everybody knows that the Earth doesn't rotate.
How else can you explain a helicopter taking off, and hovering in place for a minute, then dropping straight back to the same place it took off from...