Photo: Scrub CO2 From the Air, Win $25 Million -- But How?



U.K. business tycoon Sir Richard Branson tosses a globe in the air next to former U.S. Vice President Al Gore during a briefing to announce a $25-million-U.S.-dollar prize for scrubbing carbon dioxide from the atmosphere.

The so-called Virgin Earth Challenge offers the biggest science prize in history to anyone who can come up with a commercially viable system for removing the greenhouse gas from the air as a measure to combat global warming.

Photograph by Kieran Doherty (Britain)/Reuters


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