My picture is this, there are such things as CO2 collection stations already that are manmade and the carbon nanotube tether in fact would not be solid it would be like a chinese finger puzzle, hallow and pressurized with superheated CO2. (the static electricity might heat it) And for another thing the static electricity generated by tube would probably power the whole thing, what would use the most power is getting it into outerspace once. After that it should be able to power itself and probably alot more.
After getting into space I was hoping of a collection station with an assembly line type apparatus. Form the CO2 into objects that can be sent off into space. Yes I remember the solar sail and other items that seem to be able to be made into propellant even yes CO2 pressurized, not sure how that would work out in space, worked on WallE ;p or at least his fire extinguisher did.
Hmmm a block or a more flyable form of frozen C02 with a pressurized superheated C02 tank made from more carbon nanotubes or plastic and mylar sails. Metal would not be a good choice. Anyway thanks guys for input on this. Hope one day someone can use this discussion to an end.
Once the CO2 is space, yes what is stopping it from coming back down? Hopefully it never does, if it does it forms again in the atmosphere but im sure that some would never make it back if its sent off like I am suggesting. Or just shove it in your black hole made by your giant particle accelerator Split it into Carbon and Oxygen with Solar.
And yes all black holes were once plantary systems with their own Large Hadron Collider and a Uranium PU-36 space modulator. Ask Insane he was there.