The document discusses green computing and its history and approaches. It describes how green computing aims to efficiently use computing resources while accounting for environmental and social impacts. The document outlines the pathway to greening computing through approaches like virtualization, power management, green design, and telecommuting. It provides examples of green computing initiatives and technologies like Blackle, the Zonbu computer, and Asus Eee PC ultraportables. The conclusion states that consumer adoption of green computing has been slow but materials and efficiency will continue improving over time.