John Todd, a biologist and Earth steward, is at the forefront of the new field called ecological design, which applies the intelligence of nature to human needs. After decoding this intelligence, it can be used technologically in order to reduce the destructive impact of humankind on the planet. Todd tells about the work being done to create living technologies in the areas of food production, generation of fuels, conversions of wastes, repairing of environments, and, in his own case, the restoration of degraded and polluted waters.