"Carbon Sequestration" refers to storing the carbon from fossil fuels (e.g., oil, coal, shale, tar sands, natural gas) so that it is not released into the atmosphere.
There are two basic options for carbon sequestration:
Option #1: Extract the carbon-based fuels that are stored underground (through mining, drilling, fracking, etc...), build power and carbon-capture stations to break the carbon bonds and recapture them, then pump the recaptured carbon back underground for storage. Here's a graphic representation (as found on Halliburton's web site):
Option #2: Leave it down there. Here's a graphic representation:
Anyone taking bets on which option we'll select?