Could CCS be a dead-end?

There is a lot of hope for CCS as a solution to especially coal-fired power, but are these hopes in vain? There is evidence from experiments of CO₂-injection that so-called rapid mineral dissolution could create pathways for the CO₂ to escape back into atmosphere. And worse, on its way create toxic chemical reactions that could even affect ground-water. Certainly these experiments show that there is a risk that should not be under-estimated and that not all underground sites are useful.

It is interesting to note that representatives from South Africa, who really could use CCS, at a recent workshop in Johannesburg saw CCS as "not the answer but an interim solution".

In some comments made it has been claimed that the CO2 does not have to be stored forever but it would be enough with 5000-10000 years before it leaked back!