Indeed, some private sector analysts think there will be further coal - to - gas switch in power generation in 2013, though much less than occurred in 2012. (rhg.com)
This could provide a way to continue to use coal and natural gas for power generation with reduced emissions, an 80 to 90 % cut according to your link. (realclimate.org)
Natural gas was the biggest winner, growing from 20 % of power generation in 2008 to more than 30 % during 2012. (rhg.com)