Explore how to create a more sustainable digital future through open source technology in this conference talk from the Linux Foundation's Open Source Summit. Learn about the growing environmental impact of the web industry, from energy-intensive AI systems to resource-heavy websites, and discover practical solutions for reducing your digital carbon footprint. Examine open source tools and methodologies for measuring and minimizing emissions from web projects, while exploring actionable strategies that any open source project can implement to decrease energy consumption. Discover how the solarpunk movement's vision of technology serving both humanity and the planet can guide sustainable development practices, and gain insights into FOSS projects that are pioneering environmentally conscious approaches to digital innovation.