To find print holdings try the following subject searches on SOLO:
Environmental policy -- International cooperation
Environmental protection -- International cooperation
Global environmental change
Sustainable development
The Bodleian Library Official Papers has been a depository library for United Nations material since 1950. Its extensive collection (kept on open shelf in the Official Papers reading room located on Floor 0 of the Bodleian Law Library) include many publications resulting from the United Nations Environmental Programme.
There are 3 specialist Official Papers staff to help you if you have any difficulty.
The online guide below has been prepared by them.