How we have been treating our environment has come back to haunt us by challenging our intelligence in the most unexpected ways. Studies in Britain by Chris Williams, a social scientist at the Institute of Education at the University of London, have documented how a loss of micronutrients through soil erosion, resulting in improverished crops, combines with our exposure to synthetic chemicals to “harm the intelligence of millions of people across the world.”

Fitzgerald, Randall. The Hundred-Year Lie: How to Protect Yourself from the Chemicals That Are Destroying Your Health (p. 167). Plume. Kindle Edition.