[aoeusnth1]

100k or 100M?

200M + 100k = 200.1M, and I doubt the 200M figure had 4 significant figures.

[mercurywells]

It'd be a smaller amount that gets injected into the stratosphere, as opposed to what we normally release into the troposphere. A quick skim of the wikipedia link seems to suggest 5M tons in total, not sure what the annualized basis would be.