Through this activity, students learn about atmospheric carbon dioxide and its role in the greenhouse effect. They can identify the leading producers of carbon dioxide emissions and read about the global climate conference that was held in Kyoto, Japan, in 1997 to set international limits on these emissions. The material provides information to increase students' understanding of the implications ... Full description.

The National Atmospheric Deposition Program monitors wet atmospheric deposition (chemical constituents deposited from the atmosphere via rain, sleet and snow) at over 220 National Trends Network sites throughout the United States. This site contains a long-term, high-quality database of atmospheric deposition for research support in the areas of acid rain, air quality, water quality, agricultural ... Full description.

This database of water-related educational materials contains information on 160 nationally reviewed curricula for grades K-12. The database can be searched alphabetically, by grade level, or by topic and/or instructional format. The information provided includes a detailed description, costs (if any), and contact information for obtaining a desired curriculum. Full description.