This guide, "Green Data Centers: Towards a Sustainable Digital Transformation," published by ITU and The World Bank in 2023, provides practical information on creating environmentally sustainable data centers. The guide covers topics such as energy efficiency, renewable energy, and waste reduction. It is available under a Creative Commons license and may be reused with permission from the copyright holder. The guide does not express any opinion on the legal status of any country or territory or the delimitation of its frontiers or boundaries.