Climate change is a global environmental threat which will have increasingly undesirable effects around the world in our lifetimes. International negotiations to limit the emissions of long lived greenhouse gases (GHG) have stalled. There is a very real possibility that current emissions of GHG have already committed the world to “dangerous anthropogenic interference with the climate system”. Given current and projected GHG emissions and the domestic and international political situations, the goal of this workshop is to identify fast action technological and regulatory strategies to reduce radiative forcing that can be implemented under existing authority. Fast action strategies are defined as those which can begin in 2-3 years, be substantially implemented within 5-10 years, and have the goal of producing the desired climate response within decades (Molina et al., 2009). Examples of such strategies are: accelerate the phase-out of hydrochlorofluorocarbons (HCFCs), phase down the production of hydrofluorocarbons (HFCs) with high global warming potential, reduce emissions of black carbon (BC) particularly from sources where most of the soot is released in the form of BC rather than organic carbon (OC) and in regions where BC emissions affect snow and ice (eg. Himalaya-Tibetan glaciers, Arctic, etc.), reduce emission of tropospheric ozone (O3) precursors (particularly methane), enhance biosequestration of carbon, increase surface albedo (eg. white roofs, roads), etc.