Smithsonian Institution
Smithsonian Environmental Research Center: Forces of Change:meet Your Atmosphere
This superb site has detailed information about the composition of the atmosphere, how it is always changing, how it protects life on earth, and the destructive impact human activity has on it. There is an atmosphere design lab, as well...
University Corporation for Atmospheric Research
Ucar: Introduction to the Atmosphere
A detailed overview of the Earth's atmosphere, with explanations about atmospheric properties, the structure of the atmosphere, its four layers, atmospheric processes, energy heat transfer, conduction and convection, and radiation. All...
Florida State University
Florida State University: Atmospheric Composition
This page deals with the composition of the earth's first atmosphere and how it has changed. Also the elements and percentages that make up our current atmosphere are listed.