Greening the Blue is a United Nations-wide initiative led by the United Nations Environment Programme (UNEP). It supports the UN System in making the management of its facilities and operations more environmentally sustainable by measuring, reducing and reporting on the organization’s environmental footprint. The initiative shares information and resources to help UN entities understand their performance, track progress and improve operational practices.

A central offering is the Greening the Blue Annual Report, which presents the environmental performance of the UN System and progress in implementing its sustainability strategy. Reports are publicly available to promote transparency and offer practical inspiration to other organizations seeking to green their operations and facilities. The initiative also publishes performance data and trend information for individual UN entities, alongside guidance, training and resources on topics such as environmental management systems, procurement and waste analysis.

Through news, stories, publications, meetings and events, Greening the Blue highlights sustainability work across the UN, including waste management initiatives and efforts to monitor environmental conditions.