That people will have fewer cases of lung cancer.

Plain chalk is carcinogenic??

I'd assume getting roughly anything in your lungs frequently enough is carcinogenic.

Damn nitrogen.

You have a point. Now that I went looking, most of the literature focus on silicosis, and there aren't many long-term studies that can tell us if it's carcinogenic or not.

It's very likely carcinogenic too, but now I don't know what to expect on the correlation, because it's possible that people die from it before they get the chance of developing a tumor.

But more cases of liver cancer.

What about green chalkboards and multi colored whiteboard markers?

We're deep in contrivance at this point.