A livable climate can (probably) survive the burning of almost all of the world's conventional oil and gas -- but not if we also burn even half the coal (see here [PDF] and figure below).
So the top priority for any climate policy must be to stop the building of traditional coal plants -- which is why that has become the top priority of NASA's James Hansen (see here). The next priority is to replace existing coal plants with carbon-free power, which could include coal with carbon capture and storage (CCS), as fast as possible. And that means a related priority is to encourage the introduction of CCS as quickly as possible, to see if that is a viable large-scale solution.
A climate policy that does not start by achieving at least the first goal, a moratorium on coal without CCS, must be labeled a failure. By that measure, the cap-and-trade system currently being employed by the Europeans looks to be a failure, as we'll see.