After reading the above article I have been looking into various data sources. Here is a map of cancers per capita across the USA.

This map comes from the following source: https://www.iaenvironment.org/blog/iowa-environmental-voice/addressing-iowas-increasing-cancer-rate-the-legislative-catch22

It is hard to miss the fact that cancer rates are highest across the corn belt, and especially high in Iowa.

These are hard statistics, not hype. I suggest reading this source article.

In the source article they discuss how the legislature and governor looked into many different possible explanations for Iowa's high and accelerating cancer rates however were careful not to blame agricultural chemicals, herbicides and pesticides.

On the map it is interesting to see the lower cancer rate in south central Iowa compared to the rest of the state.  As I recall this area has more rolling hills and cattle (like MO to the south) and likely less ag chemical usage than the heavily corn and bean ag in the rest  of the state.

Note also how in the sates of Illinois, Indiana, Nebraska, Minnesota and nearby states, this county cancer data closely follows counties that are heavily into corn and beans.