Book excerpt: This book's message has nothing to do with greenwash. It is intended for people who are looking for hard, practical advice on how to fix a problem. Green IT needs to establish baseline data so that progress can be effectively tracked, and metrics are essential for that. Taking Green IT seriously also means coming up with a plan and making sure it gets delivered. So it is vital to treat Green IT as a process. You need to make the CIO responsible for the energy consumption of the data centre, and allow him to do what it takes to drive costs down. To retain momentum, your Green IT strategy also needs the support of top management. Meanwhile, lower down the hierarchy, employees need to know that Green IT is not just a fad, but something your company is treating as a real priority.