Every day, farms across the country use a potentially cancer-causing chemical that is in the world's most common weedkillers. And data shows that it's most used in the Midwest and parts of the South. Glyphosate, the active ingredient in many herbicides, has been in use for nearly 50 years. The World Health Organization's International Agency for Research on Cancer concluded in a 2015 report that the chemical "is probably carcinogenic to humans." Glyphosate's main use is in agriculture. Weedkillers containing it are used on nearly half of all planted acres of corn and soybeans in the U.S. They're also used on acres of farmland where wheat, oats, fruits and cotton are grown. Pesticide residue testing from the FDA found glyphosate residues on a wide variety of crops, including oats, soybeans, cranberries, grapes, raisins, oranges, apples, cherries and beans. A 2020 Department of Health and Human Services report notes that the greatest potential exposure is among farm workers and gardeners that use glyphosate-based herbicides and those who live near farms, manufacturing plants ... and hazardous waste disposal sites. For the general public, the report notes that exposure to glyphosate typically comes by touching or eating food or water containing residues. Some studies have found a link between increased cancer rates and higher levels of exposure. Several peer-reviewed studies have also suggested that herbicides containing glyphosate may disrupt hormones and alter the gut microbiome.