Scientists have discovered chemicals used in car tire production in leafy vegetables, raising concerns about pollution levels. Tire particles released into the atmosphere and waterways can impact cloud formation and harm wildlife with toxic compounds. Research from Switzerland, Spain, Italy, and Israel found tire ingredients in vegetables grown in various locations. One dangerous chemical found, 6PPD, can be deadly to coho salmon. The study, published in Frontiers in Environmental Science, suggests that farmers may be introducing tire additives through wastewater irrigation or sewage sludge use. While concentrations in food are low, the presence of tire chemicals is alarming.
https://e360.yale.edu/digest/tire-chemicals-vegetables-study