In Johannesburg, South Africa, the sun has gone down, and 39-year-old Nntuthuzelo Ndwandwa is heading home after finishing her shift as a customer care consultant. Previously, she might have looked anxiously into the dark corners, but now she strolls through an area brightened by solar lights and steps into her house, where a solar heater provides hot water… Read More “South Africa: Johannesburg demonstrates the benefits of eco-friendly cities for both people and the environment.”