Climate change: How does soil store CO2?

Global CO2 emissions continue to rise -- in 2012 alone, 35.7 billion tons of this greenhouse gas entered the atmosphere. Some of it is absorbed by the oceans, plants and soil. They provide a significant reservoir of carbon. Scientists have now discovered how organic carbon is stored in soil: The carbon only binds to certain soil structures. This means that soil's capacity to absorb CO2 needs to be re-assessed and incorporated into today's climate models.

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