A New York Times article reports on faster methods of temporarily slowing the rise in earth's temperature as noted in the journal Science.  The researchers focus on fourteen ways of reducing the production of soot or black carbon and the release of methane.  Methane is a very potent greenhouse gas and soot production has health as well as environmental consequences.

Source: D. Shindell et al. Science 335, 183–189 (2012)

Soot control involves using better controls on diesel powered engines and using more efficient cooking stoves.  In the long term a combination of methane, soot and carbon dioxide control were predicted to be the most successful at reducing a global temperature rise.

The Science article is not available online.  I wll read it and update the post with more information later.