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Video: Carbon storage in action

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(Read caption) Algeria's Krechba gas field is an experiment in carbon capture and sequestration.

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This video from Agence France-Presse takes you to the Krechba gas field in Algeria, where 1 million tons of carbon dioxide from a natural gas facility are pumped underground.

Financed by British Petroleum and two other partners, the Krechba project could allow companies like BP to keep pumping fossil fuels, but to prevent some of the CO2 from entering the atmosphere.

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The world emits about 27 billion tons of CO2 per year, so the Krechba project is putting only a small dent in greenhouse emissions, but some say that the dent is bigger and more immediate that what could be achieved through alternative energy solutions. It's also considerably cheaper.