I’m really fascinated with the terra preta/biochar concept. We briefly touched on the subject in our blog post Big Ideas that are Changing the World. Watch the excellent video there for a good overview of the subject.
Terra preta is nothing short of amazing. It’s considered the most fertile soil in the world, and has retained its fertility over thousands of years. Studies have reported positive effects from biochar on crop production in degraded and nutrient–poor soils. Biochar–enhanced soils can indefinitely sustain agricultural production [that means forever!], whereas non-amended soils quickly become depleted of nutrients. Compare terra preta to modern industrial agriculture that gradually depletes soil and pollutes groundwater and food sources with toxic chemicals.
