2 Billion Pounds of Cancer-Causing Chemicals Found Their Way into America in 2020 

Chemicals suspected of raising the risk of breast cancer entered America’s air by the billions of pounds within one recent year, settling into a pattern that stretches across daily life. The exposure shows up in outdoor air, tap water, food, and the products sitting on household shelves, all traced back to the same body of research. 

That research started from 920 chemicals already shown to cause breast tumors in animal studies or disrupt hormone activity. Investigators then checked how often those substances turn up in products people actually use, cross-referencing federal records on manufacturing, pesticide registration, food ingredients, and drug composition. 

Roughly 500 of those chemicals turned up in several consumer products, while food carried 462, tap water held 162, pesticide products numbered 485, pharmaceutical formulations included 142, and building materials accounted for another 106. Familiar names like benzene, BPA, as well as a common plastic softener appeared throughout the list. Separately, 143 of those chemicals were imported or made in volumes exceeding a million pounds that year. 

Five specific compounds—1,3-butadiene, styrene, benzene, acetaldehyde, and dichloromethane—made up over 90% of the total emissions logged in one federal tracking system. Vegetation, wildfires, and ordinary fuel burning generated most of that share, with acetaldehyde alone making up roughly two-thirds of it. 

Urine and blood samples from an ongoing government nutrition survey showed measurable traces of several dozen of those chemicals nationwide, some detected in a minimum of nine out of ten people tested. DDT and many other pesticides, banned in the U.S. since the 1970s and 1980s, still turned up in over 40% of participants, a persistence tied to chemical residue that degrades gradually once it settles into farmland soil. 

Oversight hasn’t kept pace with any of this. Only a handful of these chemicals count among the pollutants the government formally regulates in outdoor air, and legally binding drinking-water limits cover just 25 of them even though 162 have turned up in tap water. California’s Proposition 65 hazard list leaves out 122 substances the study’s authors say caused tumors in lab animal testing. 

A steep rise in breast cancer diagnoses among young women helped motivate the work. Between 2010 and 2019, rates rose among women in their late teens and twenties at over twice the rate found in every other age group, a trend that weight, genetics, smoking, and reproductive history don’t explain. These women are also typically too young for routine mammograms to account for the increase. 

Silent Spring Institute and UC Berkeley led the research, published in the journal Environmental Health Perspectives. Their message isn’t meant to alarm people but to guide priorities: focus first on the chemicals found in the biggest quantities and the widest range of everyday goods, then push for stricter limits or safer substitutes. 

For those women that have already been diagnosed with breast cancer, policies to clamp down on the carcinogens identified as prevalent in everyday items may be of little help. For such people, the research and development work being done by entities like Calidi Biotherapeutics Inc. (NYSE American: CLDI) offers hope that viable treatments could be available to give them meaningful clinical outcomes. 

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