Unverified50% confidenceFactExact time
The total area of discovered terra preta deposits is estimated to be between 6,000 and 18,000 square kilometers, and radiocarbon dating shows the oldest terra preta layers date back approximately 7,000 years
1
Sources
50%
Confidence
Long-term
Relevance
8/9/2026
First Seen
Sources
亚马逊失落文明：3%雨林面积曾养活300万人口
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