Data from Forrester's Business Data Services surveys show continued interest in green IT services. One-third of the surveyed enterprises plan for a green IT services engagement in the coming year. Some of these prospective clients are aggressively using green selection criteria when they choose a services provider, a trend that we expect to grow markedly in the coming years. To get ready, green IT service providers must get more explicit about their partnership structures and offer a well-rounded suite of services that enable clients to improve their sustainability posture while reducing costs, differentiating their firm, and mitigating risks.