"Virgin Earth Challenge" Misguided?

Although anything that reduces atmospheric carbon dioxide can help fight global warming, Richard Branson's $25 million "Virgin Earth Challenge" (http://www.virginearth.com) to remove greenhouse gases directly from the atmosphere may be misguided, since it promotes the capture and sequestration of dilute atmospheric CO2 containing natural background radiocarbon. In contrast, capturing and sequestering concentrated low radiocarbon CO2 directly from industrial fossil fuel emissions before it enters the atmosphere is easier and cheaper, and also permits its eventual recycling into safer foods.