Burning the forest just once can leave behind enough blackcarbon to keep the soil fertile for thousands of years.
森林仅仅燃烧一次就能留下足够的黑碳，来保持数千年土壤肥沃。
2
Unburnt vegetation rots quickly, but blackcarbon persists in the soil for many centuries.
未燃烧的植物腐烂得很快，但黑碳在土壤中存留了好几个世纪。
3
Contrary to the conventional view that human activities damage the environment, Glaser says, "Blackcarbon combined with human wastes is responsible for the richness of Terra Preta soils."