Giant space mirror sounds like a good idea

Reflective dust pumped into the atmosphere most definitely does NOT sound like a good idea.

I've always hoped that technology would get us out of the mess we've made of the planet but I've come to see the end of the oil as the end of the window in which we will be ABLE to do something. We've got to hurry.

But putting something in the atmosphere that we take out when it starts getting cold is not the way to do this.