A river in Costa Rica tinted yellow by sulfer

The chemical composition of air, soil and the earth's crust support all life on earth. Yet subtle changes in the atmospheric composition can lead to the warming of the planet, deterioration of the ozone level, and polluted city air. Uncovering how the chemistry of earth's atmosphere and surface has changed over time provides clues important for understanding the evolution of life and climate. To learn more about earth materials, geochemistry and atmospheric chemistry visit the individual faculty pages below.