The UN’s journey towards climate neutrality began on 5 June 2007 when UN Secretary-General Ban Ki-moon publicly called on all UN agencies, funds and programmes to ‘go green’ and become climate neutral.

To find out more about the origins of the UN’s work to create a more sustainable UN, who is involved and how the work is being coordinated visit

For detailed information about the methodology used by the UN to measure and report its environmental impacts please visit the Our Approach section of