"Carbon prices alone, however, will not be high enough -- at least for the next few decades -- to prompt a large-scale roll-out of renewable energy, nor will they be sufficient to promote carbon capture and sequestration. Prices will be set for many years to come by cheaper sources of credit -- energy efficiency and project-based mechanisms in the developing world. So a carbon price is an essential driver towards a lower carbon economy, but additional policy interventions will still be required."
--World Economic Forum Report, "Green Investing: Towards a Clean Energy Infrastructure," January 2009
