I think this is a bit handwavy. There is a lot of evidence to show that air quality has an impact on health. How much might be harder to quantify, but I don't t

I think this is a bit handwavy. There is a lot of evidence to show that air quality has an impact on health. How much might be harder to quantify, but I don't think it's unreasonable to think we might be underestimating its impact.