Study Improves L.A. Smog Model Estimates

The scientists studied the chemical reaction between two compounds that play important roles in the formation of ozone, a harmful air pollutant at ground level. When applied to Los Angeles, their results suggest that on the worst smog days and in the most polluted parts of L.A., current models are underestimating ozone levels by 5 to 10 percent.

Credit: Mitchio Okumura, Caltech