Amboseli National Park
A short description of park history and major features with a link to the Kenya Wildlife Service.
http://www.kws.org/amboseli.htm

The Global Climate Change Information Programme (GCCIP)
Information about global climate change.
http://www.doc.mmu.ac.uk/aric/arichome.html

The Center for International Earth Science Information Network of Columbia University (CIESIN).
A great source of information about changes that are occurring to the Earth, population databases and sustainability indicators.
http://www.ciesin.org

U.S. Global Change Research Information Office
This site provides numerous links to other agencies and organizations dealing with global change. It also provides on-line documents and bibliographic databases.
http://www.gcrio.org/

Consequences: The Nature and Implications of Environmental Change
This excellent and free on-line journal contains many articles on how humans are transforming the Earth. It is concerned with providing reliable assessments of the consequences of changes in the global environment. It is supported by several federal scientific agencies.
http://www.gcrio.org/CONSEQUENCES/introCON.html

The Gaia Hypothesis
This site provides a good general summary of the hypothesis by James Lovelock and Lynn Margulis that the earth functions as a single living entity. The author discusses the predictive value of the main idea as well as other hypotheses that are derived from it.
http://www.oceansonline.com/gaiaho.htm

The Ages of Gaia
This is a review of Lovelock's The Ages of Gaia which was published in 1989. The review provides a short introduction to the basic ideas associated with the Gaia Hypothesis.
http://erg.ucd.ie/arupa/references/gaia.html

Imagine the Universe
Lots of information on the electromagnetic spectrum. This site also provides explanations of the different forms of energy, how energy is measured, and the units that are used.
http://imagine.gsfc.nasa.gov/docs/science/know_l1/emspectrum.html

Feedback loops
The potential to amplify global warming beyond current predictions. A short article about the nature, workings, and importance of feedback loops on global climate by well known environmental scientists.
http://www.nrdc.org/globalWarming/afeedbk.asp

Exponential Growth
This site presents three examples that illustrate the tremendous growth potential of this property.
http://www.intsoft.com/powers2.html