Model
This information is provided for technical experts who intend to work directly with the database. Other users can retrieve information using the AIRS/AFS Query Form.
The Envirofacts AIRS/AFS entities are organized into the subject areas shown below. Click on a subject area to view the entities.
![AIRS/AFS Model](https://webarchive.library.unt.edu/eot2008/20081020044231im_/http://www.epa.gov/enviro/gif/afs_1.gif)