chemically "reenergize" carbon dioxide into carbon monoxide using concentrated solar power. The carbon monoxide could then be used to make hydrogen or serve as a building block to synthesize a liquid combustible fuel, such as methanol or even gasoline, diesel and jet fuel.
Basically, clean the air and make a usable fuel out of the nastiness you remove (plus water). How cool is that? The problem is that it will take quite a while before this is possible. A team at Sandia National Laboratories has a prototype device (called a Counter Rotating Ring Receiver Reactor Recuperator, or CR5) in the works, but a researcher quoted in the REA article says it's " probably a good 15 to 20 years away from being on the market." Well, at least we have one more thing to
[Source: Renewable Energy Access]