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“A single high NH4 peak, traced to biomass burning across North America, begins at the [Younger Dryas] onset. It is the largest biomass-burning episode from North American sources in the entire record.” — Graham Hancock
A single high NH4 peak, traced to biomass burning across North America, begins at the [Younger Dryas] onset. It is the largest biomass-burning episode from North American sources in the entire record.