by To be sustainable, the internet needs to assess, mitigate, and live up to its responsibilities for a healthy environment. By understanding the environmental impact, we can point to avenues where progress is possible and identify aspects of our digital infrastructures that come with unintended consequences that are too severe to look the other way. Cathleen Berger, sustainability steward at Mozilla, gave a keynote on the sustainability of the internet at OOP 2021. Sustainability is often defined as the interconnection of social connection, economic well-being, and a healthy environment. In trying to better understand how we may approximate the internet’s environmental impact, Berger looked at different research papers that estimate the impact of social media, online advertising, and online streaming, for example: