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Thousands of years ago, the region’s Indigenous peoples solved this problem by creating “terra preta” from table scraps and charcoal and tucking it away in the hostile soil.

The fact that scientists are finding intact biochar in the Amazon’s ancient terra preta suggests that it’s happening.

Hunter and Preta were separated from him on Tuesday, as they boarded different boats during a rescue operation.

In the Amazon, ancient people intentionally boosted soils with charcoal, creating terra preta, or “dark earth” areas that remain nutrient-rich today.

Leo's mother Preta says on the surface the work was really appealing for a teenager.