Infrastructure embodies the human drive to innovate and advance. Today’s tallest towers, longest bridge expanses, fastest transport, and clearest waterways represent the pinnacle of a repeating cycle: As we learn more, we aspire more, and we build better. Today, the ambition to enhance our built environment takes on a new urgency. Engineers must adapt water, energy, and transportation systems to the heat, floods, and extreme winds that have become more common. We must protect vital habitats to halt mass extinctions, tuning our built environment to support ecosystems rather than degrade them.