The document discusses how making energy data open and accessible through measurement, communication, and visualization can help address problems of increasing energy needs and climate change by making energy use more visible and understandable to consumers. It highlights several existing and proposed tools and applications that aim to measure, share, and display energy data in real-time and engaging ways to encourage awareness of energy consumption. The talk advocates for open standards and a do-it-yourself approach to developing new tools and visualizations for energy data.