Information and Communication Technologies (ICT) is probably one of our most powerful and flexible tools for addressing today’s great challenges: global warming and exhaustion of resources. However, ICT itself is a considerable source of carbon emissions in the environment, due to e-waste, electricity to power electronic devices, and in particular because of the huge amount of energy needed to keep data centres and the underlying infrastructure up and running. With progressive digitisation of society and business moving to the cloud the ICT environmental footprint is growing dramatically.