[shouldbworking]

It's well known that large volcanic eruptions have caused global cooling for a few years that's severe enough to lower the temperature of earths surface several degrees.

I don't think anyone can deny that it's possible to cool the Earth by putting stuff in the upper atmosphere because we've already seen it happen during recorded history.

[hyperbovine]

The Tambora phenomenon is well documented. But that does nothing to solve other problems like e.g. ocean acidification, and potentially causes many problems of its own. It's a really complex system and we need to spend way more time and money understanding it than we currently are.