He does call for the regulation and reduction of emissions of: methane which is a greenhouse gas and for those smog producers such as NOx and VOC. Whereas there is no political or scientific consensus on CO2/warming, there is no disagreement on smog/ozone as a problem.
Hansen has written that any global political/economic consequences faced by Bush/US for rejecting CO2 regulation would be offset by regulating smog producing compounds. Hansen refers to this as "taking the high ground away from Europe".
It is important to note actions being taken by individual states on CO2. There are several and where else but the west coast and the northeast. Most recently California has indicated that they will attempt to regulate tailpipe CO2 while Texas, on the other hand, has rejected even doing a CO2 inventory and will concentrate on NOx, VOC, CFC, etc.