How Ground-Level Ozone Forms: Sources and Chemical Reactions #96115 (License: Personal Use)

This educational diagram illustrates the photochemical process behind tropospheric ozone formation, where solar UV radiation (hv) splits oxygen (O₂) and nitrogen dioxide (NO₂), leading to ozone (O₃) production. Key emission sources shown include diesel trucks (emitting COV + NOₓ), industrial smokestacks (COV + NOₓ), and aircraft (releasing NOₓ), all contributing precursors under sunny conditions. The visual emphasizes the role of sunlight as the catalyst in this air pollution mechanism.

Used in environmental science articles, public health advisories, or educational resources explaining smog formation; targets users seeking to understand urban air quality issues, pollution sources, or climate chemistry fundamentals.