Counties with animal feeding operations have more air pollution, less health insurance coverage
Counties with animal feeding operations have more air pollution, less health insurance coverage

www.eurekalert.org
Counties with animal feeding operations have more air pollution, less health insurance coverage

I highly doubt there's any causative relationship between any of these factors. Seems like they'd all be attributable to being less-developed, less wealthy countries.
Edit: probably some causation between animal feeding operations and pollution, but I don't think it would be the primary cause.
Pollution isn't just smog. Anywhere near a pig farm will have water pollution like crazy.