Terra Preta soils were found in the Amazon basin. No other tropical soils are as rich. How were the soils created? Science is discovering the Secret of El Dorado? The soils were created by a slow charcoal burning process. Slash and smolder may have replaced slash and burn agriculture. Can carbon be stored in these soils? Can soils world wide be improved by the Secret of El Dorado. These soils may lead to a new agriculture that could feed people for thousands of years. While capturing carbon and storing it in the soil to slow global warming.