The Earth's Carbon Cycle
The Earth maintains a natural carbon balance. When concentrations of carbon dioxide (CO2) are upset, the system gradually returns to its natural state. This natural readjustment works slowly, compared to the rapid rate at which humans are moving carbon into the atmosphere by burning fossil fuels. Natural carbon removal can't keep pace, so the concentration of CO2 in the atmosphere increases.
In the following sections, we will examine the Earth's natural carbon balance and how humans are affecting this balance.
The Natural Carbon Balance
Upsetting the Balance
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Visit the Marian Koshland Science Museum to learn more.
The museum's eco-sphere is sealed. No air, water, nutrients, or any other matter enters or escapes the system. The Earth’s carbon cycle is also very nearly sealed. In both cases, plants and animals flourish. |
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