To summarize: A lot of correlations between negative things happening and increased levels of air pollution, very little of which is rigorously causally linked. Case in point:

> Stock market returns are lower on days with higher air pollution

I can't take this kind of article seriously. It presents a completely one-sided argument, and it's worded carefully so as to avoid outright statements of causality, but imply it nevertheless by pointing to a large number of weak correlations that together sound convincing. The overall conclusion was decided first, and the so-called evidence cherry picked to try and support it.