This document provides an analysis of personal footprint and sustainability, including ecological and carbon footprints. It discusses the calculation and significance of ecological and carbon footprints, as well as the contribution of different categories to the global footprint. The document also explores the unsustainability of air conditioners and potential solutions. Additionally, it touches upon waste hierarchy, cradle to cradle design, and corporate social responsibility. The document concludes with a discussion on the impact of air conditioners on the environment and the importance of addressing sustainability issues.