An Element on the Move: An interactive game that puts you in charge of carbon as you cycle through different earth features and organisms.
Carbon Cycle: Diagrams and an explanation of the carbon cycle, including how humans are impacting the balance.
Chemical Carousel: A Trip Around the Carbon Cycle: A complete look at carbon and its role in the environment and living things.
Concept Map on Carbon Cycle: Detailed concept map.
EO Library: The Carbon Cycle: NASA's explanation of the carbon cycle, including descriptions of missions to study the global cycle.
Global Carbon Cycle - The Woods Hole Research Center: A look at carbon and land use, missing carbon sinks, and how forests sequester carbon dioxide. Includes numerous graphs.
SeaWiFS Views the Global Carbon Cycle: NASA's visible earth project shows photosynthetic productivity for the earth in animated images of the earth.
The Carbon Cycle: Detailed diagram and a look at how the cycle impacts global warming and the greenhouse effect.
The Carbon Cycle: Why carbon is so important, how humans have interfered, and probable effects.
The Carbon Cycle: Past and Present: Numbers showing how much carbon cycles in which parts of the cycle.
The EPA Global Warming Kids Page--Carbon Cycle Animation: Animations of how global warming occurs and how it is linked to the carbon and water cycles.