Green data centres are the talk of the day. But who in fact is involved in developing green data centres? What is their contribution? And what does this contribution constitute in practical terms? This article states which stakeholders are involved in green data centres in the Netherlands, what their involvement is and what effect their involvement has. The article starts by giving the definitions for sustainability and by determining the stakeholders and their possibilities in this field. Next, we examine the actual impact of each stakeholder for arriving at greener data centres. This leads to a number of conclusions for achieving a larger degree of sustainability.