This has been thoroughly covered elsewhere at realclimate.org and it is opined that further clean up could be a problem.  Although, given all the crap that the Chinese are putting out with their coal fired plants, I'm not too worried about that for the near term future. Also, Bush is doing his part by refusing to make coal plant upgrades subject to the latest pollution controls.

What I wonder is, could be possible to get the right type of aerosols up there in the atmosphere without otherwise harming people, plants, and wildlife?   Some people have suggested we wait for this kind of solution when we have a crisis.  I don't think there is a chance in hell that we will avert further and horrible global warming without some drastic technological fix like the one suggested.  It is suggested, however,that such an approach may destroy the ozone layer.  Nice tradeoff, as usual.

In short, that which will solve the problem is not politically feasible; that which is politically feasible wil l not solve the problem.  

 

One proposed aerosol making method is to use very sulphur rich fuel for aircrafts and I suppose sulphur free fuel while starting and landing.