I'll take it a step further and say I don't think sequestration will work if economically productive materials or systems can't be made out of the resulting car

I'll take it a step further and say I don't think sequestration will work if economically productive materials or systems can't be made out of the resulting carbon. Humanity is too shortsighted to fix it without gain. It's worth investing not only in the technologies that can halt climate change, but also the technologies that will enable us to survive as we endure increasingly volatile climate change.