Reply #2: In the long term we'll bring emissions down to zero

[bananas]

This poster (PDF) gives the long-term outline: http://www.princeton.edu/~cmi/research/Vancouver04/Socolow_Poster%20v2-1.pdf

The Climate Progress article in the OP calls for 12-14 wedges:

It would require some 12-14 of Princeton’s “stabilization wedges” — strategies and/or technologies that over a period of a few decades each reduce global carbon emissions by one billion metric tons per year from projected levels (see technical paper here, less technical one here). The reason that we need twice as many wedges as Princeton’s Pacala and Socolow have said we need was explained in Part 1. That my analysis is largely correct can be seen here: “IEA report, Part 2: Climate Progress has the 450-ppm solution about right.”