Interesting stuff, but 'global dimming' has been known about as a driver of Northern Hemisphere climate change for some time now* and it's been factored into the latest climate models. Also this doesn't explain the simultaneous temperature rises in the Southern Hemisphere where its harder to invoke fewer carbon and sulfur particles in the atmosphere.

There's plenty to worry about with sulfur particles - they not only cause acid rain and affect soil chemistry and crop yields. They are linked to human health problems and would only increase the acidification of the oceans. So we might be able to ward off a warming ciimate only to screw another part of the planet. Not to mention, when they're up there in the atmosphere, there's nothing we can do to get them back if we find they're causing trouble.

* it's even been on the dumbed-down 'Horizon'. (That's the one that was on before they went for broke and decided to have a programme about 'maffs' hosted by Alan Davies. It can't be long before Barbara Windsor is on a quest for the HIggs Boson.