Whether you a given a list of topics to choose from or selecting a topic of choice, your selection is incredibly important. For instance, if you select a topic that does not interest you or that is too broad or narrow, it will impact the finished product of your work. Below are some strategies to utilize when deciding on a topic and some websites that contain topic lists for your particular area(s) of study.
GREENR (Global Reference on the Environment, Energy, and Natural Resources) -- Provides focus on the physical, social, and economic aspects of environmental issues.
Gale Virtual Reference Library -- A database of encyclopedias and specialized reference sources for multidisciplinary research.