Plants naturally take in carbon dioxide they need for photosynthesis, the process of changing light energy to chemical energy.

VOA: special.2010.01.26

The process releases some carbon dioxide, but Rajan Vempati says it would be reabsorbed into the soil naturally.

VOA: special.2009.12.01

The bioreactors will grow algae that can produce ethanol fuel through a special process that involves using carbon dioxide from nearby coal-burning power plants to promote faster growth of the algae.

VOA: standard.2009.09.02

We know how to sequester carbon dioxide during this process.

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As well as destroying such native ecosystems, deforestation also diminishes so-called "carbon sinks" -- thereby reducing the Earth's capacity to absorb and re-process atmospheric carbon dioxide -- while also adding to air pollution through the burning of land to clear it for cultivation (sugarcane fields are traditionally fired prior to harvest to remove leaves and drive away snakes).

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At the moment it comes from natural gas, oil or coal, in a process that spits out carbon dioxide.

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