This document discusses sustainability from multiple perspectives. It begins by defining sustainability as the ability to continue a behavior indefinitely. It then presents four scenarios related to sustainability: (1) individual actions like raising independent children; (2) social projects around issues like rare diseases; (3) creating a sustainability model for the Amazon forest that balances various stakeholders; and (4) a cultural perspective about creating a culture capable of sustainability solutions. The document emphasizes that sustainability requires creative, multi-disciplinary solutions that consider environmental, economic, and social dimensions.