Global Change Information and activities on global change issues. Ozone Layer Explanation of the importance of the Ozone Layer, its location, vulnerability, and steps to preserve it. Plant Growth and Global Change Shocking satellite data suggests a strong link between recent increases in plant growth and global warming. Air Quality Database EPA's air quality and pollution database.
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Acid Rain 2000 Excellent content about the causes and forms of acid rain, its ecological effects, and program details. Clues to Climate Change Information concerning the cause and effects of climate change. A timeline of the causes and effects behind climate change, beginning 65 million years ago to the present. Studying Past Climatic Conditions Paleoclimatology is the study of past climatic conditions on Earth. This site describes how and why past climates are studied.