Sustainability is a growing and important topic and can be done effectively only if everyone delivers their part to it. The data centers' global energy consumption, and therefore the reason for CO2 emission, is around 2%. That maybe doesn't sound a lot but is equivalent to Canada or Germany, and is also bigger than the emissions caused by airplanes.
At the same time, open source gets relevant momentum and can be found in many system implementations or is the foundation modern systems are built on. That's why we would like to propose you the TAG Sustainability. We as a community can lay the foundation for sustainable software, sustainable open source projects and best practices to deliver our part for a positive change in the future.