Assembly had decided that the ad hoc secretariat would have its headquarters at Geneva and have units in New York and Nairobi. Those units would have a dual role: they would deal both with substantive issues and serve as a liaison with United Nations bodies and relevant intergovernmental and non-governmental organizations. 3. The United Nations Environment Programme (UNEP), the chief body dealing with environmental questions, and the United Nations Centre for Human Settlements (Habitat), both of which had headquarters at Nairobi, must contribute fully to Conference preparations. There were in fact many agenda items which fell entirely within their mandates. The Conference would not be a substitute for their work, but would provide them with political support that would allow them to accelerate the processes they had initiated, achieve their objectives more quickly and broaden their scope. The Nairobi unit would also serve as a liaison between those bodies and the Conference secretariat so that work could proceed in accordance with the guidelines issued by the Preparatory Committee, which meant the specialists assigned to the Conference secretariat would be in constant contact with those at UNEP and the Centre for Human Settlements. 4. The New York unit would also have an important role to play, given that New York was the system's focal point. The Conference secretariat would be called upon to work closely with the various services of the United Nations Secretariat, the United Nations Development Programme (UNDP) and the permanent missions in all matters having to do with, inter alia, the relationship between environment and development, the transfer of technology and the transfer of resources, three areas which the Preparatory Committee considered essential. Proximity to Washington, D.C. would make it possible to establish useful contacts with other organizations and the private sector. A/C.5/44/SR.63 English Page 3 (Mr, Strong) 
**Analysis**
The text discusses the preparations for a conference and the role of various units in the United Nations system, including the United Nations Environment Programme (UNEP) and the United Nations Centre for Human Settlements (Habitat). The text highlights the importance of environmental questions and the relationship between environment and development, which suggests that the category is likely to be related to natural resources and environment. Additionally, the text mentions the transfer of technology and resources, which could also fall under the category of science and technology.

**Category**
Natural resources and environment, Science and technology