People exposed to weedkiller chemical have cancer biomarkers in urine – study | US news | The Guardian

The problem is the genetically modified crops called "Roundup Ready". They allow farmers to blanket spray the entire field. The plants absorb it but are not affected. You eat the plants and are affected.

https://www.theguardian.com/us-news/2023/jan/20/glyphosate-weedkiller-cancer-biomarkers-urine-study