The Earth cools after volcanoes erupt. Now some researchers now think we should mimic those effects to reduce global warming. What could possibly go wrong?

http://www.bbc.com/future/story/20190220-how-artificially-brightened-clouds-could-stop-climate-change

One of the problems is determining the long-term effects. I would think that CPDN could play a role in that.

And there are conspiracy theorists who claim this is happening on a massive scale already. I know one who blames virtually any overcast day on this.

I think it has been established that the level of sunlight reaching the earth has been dropping for a couple of decades at least. It is apparently due to pollution and increasing cloud cover. It surprised the scientists quite a bit when they found it, as they just assumed that it was constant and never bothered to measure it.

The conspiracy is called civilization.