In the frenzied search for solutions to the global warming crisis, climatologists, policy makers and other concerned environmentalists have overlooked one of the leading causes of rising temperatures around the globe—soot—the black residue that coats fireplaces and darkens vehicle exhaust. Black carbon soot may in fact be the second largest contributor to global warming next to the greenhouse gas carbon dioxide.
According to Stanford environmental engineering Professor Mark Z. Jacobson, “Soot, or black carbon, may be responsible for 15 to 30 percent of global warming, yet it is not even considered in any of the discussions about controlling climate change.” (“Nature”, ScienceDaily, Feb. 9, 2001). Jacobson also observed that human beings produce most of the soot particles that pollute the atmosphere. He maintains that soot consists primarily of elemental carbon and that 90 percent of it comes from the consumption of fossil fuels (particularly coal, diesel fuel, jet fuel, natural gas, kerosene) and the burning of wood and other biomass. Jacobson also claims that a worldwide reduction in soot emissions and controlling biomass burning could quell the alarming pace of global warming and also reduce our reliance on soot-producing fuels. ( http://www.sciencedaily.com/releases/2001/02/010208075206.htm.)