Atmospheric Chemistry and Climate Processes
Atmospheric chemistry explains how gases, particles, sunlight, radicals, clouds, emissions, deposition, and transport shape climate processes and air quality. This article examines the atmosphere as a chemically active system, connecting greenhouse gases, ozone, aerosols, nitrogen oxides, sulfur compounds, volatile organic compounds, methane oxidation, hydroxyl radical chemistry, photochemical smog, radiative forcing, atmospheric lifetimes, and climate feedbacks. It shows why climate is chemically mediated: molecular composition influences radiation, temperature, oxidation capacity, clouds, precipitation, ecosystem exposure, and human health. By linking reaction rates, first-order lifetimes, carbon dioxide forcing approximations, ozone screening, monitoring networks, and atmospheric evidence, atmospheric chemistry becomes one of the key bridges between molecular science, public health, environmental governance, and planetary habitability.








