

We actually do. Cargo ships used to give off white smoke because they burned sulpher. A new law went into effect that stopped them from burning sulpher and the clouds went away and we saw a spike in temperature.
So we have some data. We’ve already been experimenting with global climate. Might as well experiment to try and fix it.
You wouldn’t need to use sulfur if you actually did it on purpose. You could use many other methods to make clouds.