California flags acrolein and ethylene oxide as cancer risks far higher than benzene

California officials say two common ambient air contaminants, acrolein and ethylene oxide, may pose cancer risks more than 10 times benzene (about 800 in 1 million), prompting a 45‑day public comment period as OEHHA updates risk values; the finding emerges amid federal rollbacks on ethylene oxide and ongoing concerns about California’s air quality.