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Aggressive action to reduce soot emissions needed to meet climate change goals http://apocadocs.com/s.pl?1277472725
Without aggressive action to reduce soot emissions, the time table for carbon dioxide emission reductions may need to be significantly accelerated in order to achieve international climate policy goals such as those set forth in last December's Copenhagen Accord... The Princeton University researchers assessed the climatic contribution of "carbonaceous aerosols," fine particulates emitted into the atmosphere and commonly known as soot. Soot is produced by the incomplete combustion of organic matter and comes from a variety of sources, ranging from diesel engines and coal combustion to biomass cook stoves, crop burning and wildfires.
Soot has complex effects on the global climate when airborne or deposited on snow. It has two main components: black carbon and organic carbon. Black carbon is dark and absorbs radiation, thus warming the atmosphere; organic carbon is light colored and reflective, so tends to have a cooling effect.... Their best estimate indicates that eliminating soot pollution from "contained combustion" sources such as diesel engines and poorly-controlled coal sources would provide the world with an additional eight years (with an uncertainty range of about one to 15 years) to reduce carbon dioxide emissions. Conversely, if these sources of carbonaceous aerosols continued at levels seen in the 1990s, more aggressive reductions in carbon dioxide emissions than previously recognized would need to occur for the world to meet the goal of avoiding "dangerous anthropogenic interference with the climate system".
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