Recent Radiolab podcast talks about the one and maybe only benefit of IQ testing is geographic screening of toxins. For example, lead paints and lead as a fuel

Recent Radiolab podcast talks about the one and maybe only benefit of IQ testing is geographic screening of toxins. For example, lead paints and lead as a fuel additive cause over a large sample a cumulative drop in IQ of 4 points. The statistics actually were the way this negative health effect was discovered in 1979. Testing for lead in the body that has replaced calcium isn't otherwise easy test (requires bone sample, or cleverly, kids' baby teeth). https://www.wnycstudios.org/podcasts/radiolab/articles/g-problem-space https://www.wnycstudios.org/podcasts/radiolab/articles/g-pro...