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Carbon sequestration occurs when carbon is removed from the atmosphere, or captured directly from industrial emission sources, and then stored (sequestered) where it cannot readily reenter the atmosphere. Most atmospheric carbon is present in the form of carbon dioxide (CO2) and methane. Although these gases constitute a minor component of the total atmosphere (less than 0.1 percent of all atmospheric gases), they are among the primary greenhouse gases and contribute directly to global warming.

Burning fossil fuels and converting forest lands to agriculture release large amounts of carbon to the atmosphere and are leading to a rise in atmospheric CO2 and methane levels. Stabilizing atmospheric greenhouse gas concentrations will require either a reduction in the amount of carbon being released or an increase in the rate ...

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