We know from studying when volcanoes spew SO₂ to the stratosphere that is breaks down by itself over 1-2 years. So if it somehow causes some unforeseen bad eff

We know from studying when volcanoes spew SO₂ to the stratosphere that is breaks down by itself over 1-2 years. So if it somehow causes some unforeseen bad effect, we just have to wait a while as it goes away.