Data centers are at the lynchpin of the Internet and require huge amounts of energy to operate. Technology companies are the leading edge of demonstrating sustainable operations. Companies are racing with each other to demonstrate sustainability of their data centers. What are the parameters of a sustainable data center? What strategies are companies using to source their energy requirements? How are companies using their technical know-how (such as machine learning, AI, etc.) to reduce their energy requirements? What actions are technology companies taking to influence behavior of their customers? What can we expect for innovative designs and energy use in the future?