Terra Preta soils turn up in large patches all over the Amazon, where they are highly prized by farmers.

Terra Preta 土壤在整个亚马逊地区大面积出现，农民们对其高度重视。

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Radiocarbon dating shows that the charred wood in Terra Preta soils is typically more than 1,000 years old.

放射性碳年代测定法显示，亚马逊黑土中被烧焦的木头通常有1000多年的历史。

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Now it seems the richness of the Terra Preta soils may explain how such civilizations managed to feed themselves.

现在看来，Terra Preta 丰富的土壤可以解释这些文明是如何养活自己的。

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The Cordao do Bola Preta 95th annual street parade kicked off at 1000 (1400 GMT) on Saturday.

BBC: Thousands of carnival revellers on a Rio de Janeiro street

Some of the terra preta is thousands of years old.

ECONOMIST: Biochar could enrich soils and cut greenhouse gases as well