Sadly, the cause from cancer trends is not always certain (from a Beverly Hills high School in 2006): https://latimes.com/archives/la-xpm-2006-nov-23-me-bevhil

Sadly, the cause from cancer trends is not always certain (from a Beverly Hills high School in 2006): https://latimes.com/archives/la-xpm-2006-nov-23-me-bevhills23-story.html https://latimes.com/archives/la-xpm-2006-nov-23-me-bevhills2... >> As the case moved along, the city and the school district groused that Brockovich-Ellis and Masry had refused to divulge data that they said showed high levels of benzene, a cancer-causing chemical. The court ordered them to do so, and the numbers showed mostly normal readings. >> The dismissals satisfied Wendy Cozen, an epidemiologist and an associate professor of preventive medicine at USC. “There’s not a lot of evidence that a standing oil well could cause Hodgkin’s or non-Hodgkin’s or thyroid cancer,” she said.