BBCnews has this report on a potential technology for use in removing CO2 from the atmosphere. Dubbed "artificial trees", these modified-goalpost-like contraptions, on paper at least, would filter the carbon out of the air as it blew through the filters between its posts. The filters would then be recycled and the carbon stored elsewhere (a large pencil factory?)

All still very, very preliminary, but it does show that the greenhouse gas problem might just be a temporary one, instead of this chicken-little crisis the greenies tend to make it out to be.