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Chemistry

The Interaction of Polycyclic Aromatic Hydrocarbons with Atmospheric Aerosols

Quick fact

Polycyclic aromatic hydrocarbons (PAHs) with four or more rings are almost entirely bound to particulate matter in the atmosphere, making them a key component of the toxic cocktail in fine particles that can penetrate deep into the lungs and are linked to cancer.

Why this is interesting

You've probably heard of PM2.5, but did you know that some of the most toxic chemicals in the air hitch a ride on these tiny particles? How do polycyclic aromatic hydrocarbons—sprawling carbon rings—bind to atmospheric aerosols, and why does that matter for your health?