Current funding for the Gi21 program ended on September 30, 2008 and the information found in the program modules is up-to-date as of December 31, 2008. To facilitate use of the modules from now till the future continuation of the program, new documents can be posted from each module and sub-module main pages and the community discussions are open. However the main module pages and documents will not be updated. If you have any questions, please contact Kirsten Clark.
The environment is a complex topic encompassing the physical, chemical and biological interactions of our world. A variety of U.S. government agencies oversee the environment through research, education, regulation and enforcement.