Cures for Global Warming prize offered by Richard Branson

Heh, I predict that as unreactive as CO2 is, and considering the fact that fossil fuels still provide most of our energy sources, any device that could "scrub" GHGs from the atmosphere will inevitably add more CO2 to the atmosphere than it scrubs out.If you want to address global warming, move over to alternative energy sources first, then see if you need to sequester GHGs from the atmosphere artificially.

Thanks for that site Nighttrain.I've heard this proposed before but don't claim to know anything in depth about this concept.I would not be opposed to small-scale, thoroughly-documented pilot tests but a large scale attempt would come with all the hazards of perturbing a system you don't understand that well. Specifically I'd be concerned about toxic blooms/red tide-type phenomena. There may be some more biologically-minded people around that could discuss or dispel that concern...