Check out the library's databases for up-to-date developments on an issue. Ask Mrs. McLean for help.
Look at the UN Economic and Social Development page, which has an index to some prominent issues as well as a list of UN agencies that work in various issue-areas. Also, through the United Nations Documentation Center, you can find resolutions and voting records from the current and previous years.
Visit non-governmental organization (NGO) websites. NGOs are an important part of the UN system, in part due to the valuable research and information they generate. Look for NGOs that address your topic.
Read academic publications. Although they can be complex, they provide in-depth information on many issues. Professors, students and researchers are constantly conducting studies and publishing papers.