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Sure, you can track people over 70 years, follow up to see if they die from cancer, and then record the result. But then, everyone affected is already dead.
We already know how certain chemicals affect people, and because of that, we can protect people before they die of environmental issues. That's the point of the EPA. Not simply to measure problems after they happen.
In any event, I’m surprised/not-surprised that PP doesn’t take a pass at explaining why they’re not even looking at actual disease data.
also would you point out an example of ProPublica being as grossly unscientific as you claim? i'll wait