The Atmosphere
This NASA web site provides a basic description of the atmosphere.
http://liftoff.msfc.nasa.gov/academy/space/atmosphere.html

World Climate Report
This web site addresses current issues about the changing climate.
http://www.nhes.com/home.html

Global Climate Change
A fact sheet prepared by the U.S. Department of State about the Kyoto Protocol.
http://usinfo.state.gov/usa/infousa/laws/treaties/fact0198.htm

EarthTrends, Climate and Atmosphere
An information portal sponsored by the World Resources Institute. This web site contains information on the greenhouse effect, CO2 trends, and fossil fuel combustion.
http://earthtrends.wri.org/

U.S. Global Climate Change Research Program
This interagency program conducts research to monitor and understand factors involved with a changing climate. Read findings from the Intergovernmental Panel on Climate Change, see what data are being collected and how data are changing policy, and check out what type of research is being conducted and why. Also find many good links to other global climate change internet sites.
http://www.usgcrp.gov/

Consortium for International Earth Science Information Networks (CIESIN)
This CIESIN web page provides access to several global climate change links.
http://gcrio.ciesin.org

The Aspen Global Climate Change Institute
This institute is dedicated to advancing climate change science and education.
http://gcrio.ciesin.org/agci-home.html
Be sure to check out the EarthPulse NEWS subdirectory:
http://gcrio.ciesin.org/ASPEN/epnews/EPNews.html

Global Climate Information Programme
This program of the Atmospheric Research and Information Centre out of Manchester Metropolitan University, UK, has a number of good fact sheets on subjects of global warming, climate change, and the greenhouse effect.
http://www.doc.mmu.ac.uk/aric/gccsg/index.html

Goddard Distributed Active Archive Center
From the Goddard Space Flight Center at NASA, this active archive has substantial resources. View data and satellite images and check out interesting facts on general atmospheric dynamics and chemistry.
http://daac.gsfc.nasa.gov

Mauna Loa Observatory
Provides access to sites for climate monitoring and change.
http://www.cmdl.noaa.gov/obop/mlo/

National Oceanic and Atmospheric Administration Climatic Data Center
View current data on atmospheric ozone trends, temperature trends, and other atmospheric trends, and find out what climate research NOAA is conducting.
http://www.ncdc.noaa.gov/

National Oceanic and Atmospheric Administration El Nino Page
Everything about El Nino.
http://www.elnino.noaa.gov