An international team of scientists used data from Antarctic ice cores to trace a 700-year old increase in black carbon to an unlikely source: ancient Maori land-burning practices in New Zealand, conducted at a scale that impacted the atmosphere across much of the Southern Hemisphere and dwarfed other preindustrial emissions in the region during the past 2,000 years. Their results make it clear that human activities have impacted Earth’s atmosphere and climate earlier and at larger scales than previously known.
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Source: ScienceDaily