This document discusses sustainable engineering and transportation. Sustainable engineering aims to maximize social benefits and minimize environmental impacts. It considers issues like community effects, economic activities, and environmental contamination. In contrast, traditional engineering focuses on performance and costs. The document provides examples of how sustainable engineering would design computer infrastructure differently by considering electricity usage and recycling. It also discusses how transportation accounts for a significant portion of energy consumption and emissions. Green transportation prioritizes public transit, cycling, walking and aims to reduce these environmental impacts.