The document discusses software sustainability and how using the web as a common language can help achieve it. It defines software sustainability as a product's ability to operate over long periods of time without degrading itself or the environment. Using ubiquitous, open web standards and tools allows software to be more flexible, reusable, adaptable, reliable, scalable, and supported. This helps lower costs and increase popularity. Two examples are given: a tourist mobile app for Cyprus that lets users find nearby attractions, get directions and reviews; and a web-based smart home system that could adjust devices and filter controls.