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"A New Zealand scientist has claimed to have developed a way to extract carbon dioxide from the atmosphere, and will submit into Richard Branson's global warming competition. From the article:
Graeme Brown has invented a substance which can absorb carbon dioxide from the atmosphere. The substance, dubbed Planetite, is derived from the naturally occurring mineral crystal Zeolite. Brown says Planetite can absorb carbon dioxide and separate the molecule into carbon and oxygen which can be re-used.