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A  by John All et al., “Fire Response to Local Climate Variability,” investigates whether or not human interference in the fire regime of Huascarán National Park in Peru was the primary cause of an increase in fire activity in the park. In an interview with GlacierHub, John All, a research professor in the Department of Environmental Science at Western Washington University's Huxley College of the Environment, said , “There are multiple potential sources of black carbon, but our work indicates that black carbon on glaciers in the Cordillera Blanca is almost entirely ‘young’ carbon – i.e. not fossil carbon like diesel. Mountain fires potentially provide large amounts and large particle sizes of local black carbon that can be deposited immediately onto the glacier.”