San Franciscoâs first 100% âoff-gridâ building, modeling solar power and alternative wastewater technologies opened at Bay View Hunter's Point on Earth Day. Also this weekend was a deeply moving multi-day ceremony called Welcome to Ohlone Territory also held at Heron's Head Park. And an update on the World Bank loan to South Africa's parastatal Escom. Then John Mayer and John Stauber of Organic Consumers Association talk about toxic sludge and how San Francisco's âgreenâ mayor has sludge on this hands.