Exploring the Earth on Fire: Carbon Cycle - an explanation.
Environmental Protection Agency - The Explorer's Club: Fun things to read and do about the environment. This is a Student site for grades 5-8. Also try the grades 9-12 web site.
EPA: Global Warming - dedicated to the discussion of global warming including what is known and uncertain in many categories.
EPA: Global Warming for Kids - Learn about global warming; site includes links, games, and animations.
Geography4Kids: The Carbon Cycle - a basic explanation.
Global Warming: Facts and Our Future - The Marian Koshland Science Museum offers an interactive learning experience specifically designed for teenagers and adults concerning global warming.
Greenscreen: The Global Habitat Project - promotes environmental awareness in young people through science-based educational materials, written by kids for kids.
NASA Earth Observatory: The Carbon Cycle - a reference.
Nitorgen Cycle Animation - a Shockwave animation demonstrating the nitrogen cycle.
The Nitrogen Cycle - explained at ThinkQuest.
Programs at UCAR - Because climate, pollution, and the environment are part of the everyday awareness of young people, the atmospheric sciences offer an unusual opportunity to teach science in engaging, relevant ways. UCAR's K-12 education programs target both students and educators.
Regents Prep: Interrelationships - The Earth has limited to resources to support populations of humans and other organisms. Our ever increasing human numbers is depleting many of our planet's resources and placing severe stress on the natural processes that renew many of our resources. Explore them here.
Rotten Truth: Garbage - What is Garbage? Learn more at this site.
The Water Cycle - a complete explanation of all components of the water cycle including text, diagrams, and pictures from USGS.
What is the Carbon Cycle? - an excellent explanation from ThinkQuest.
Windows on the Universe: The Carbon Cycle - 3 versions of an explanation: beginner, intermediate and advanced.
Windows on the Universe: The Nitrogen Cycle - 3 versions of an explanation: beginner, intermediate and advanced.
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