I think carbon sequestration is something that we will need to do if we don't want to see all of our coastal cities under water.
( Wiki - carbon sequestration )
The problem is all of the stored hydrocarbon we burned in the past it's going to take almost as much energy to put back.
This week 9/30/09 opens the South African Carbon Capture and Storage (CCS) conference.
CCS technology can help SA reduce emissions
"We cannot neglect any technology that will assist us to address the matters of energy security and climate change" - Republic of South Africa Minister of Energy, Elizabeth Dipuo Peters.Why is the US not leading this?
Storage must be at depths below 800 m, as the CO2 becomes a super-critical liquid and occupies less space. It is not trapped in a cavernous space, but within porous rock, like a sponge. It is trapped underground by the cap rock, as well as by the capillary action of the ‘sponge' storage rock; and, in the case of deep saline aquifers, it is trapped by dissolving in the water; and, finally it is trapped through a process of calcification as the gas becomes part of the rock - the reaction takes time, but at this stage storage is permanent.