What should I write about?
What search terms should I use?
My professor said my topic is too broad, what are narrower topics related to my idea?
Reference books can help you with these questions: encyclopedias, handbooks and dictionaries.
Environmental Studies & Related Online Reference Books:
(See the Biology & Biochemistry Research Guide for additional titles)
Biodiversity, Conservation & Ecology
Global Warming & Climate Change
Literature Reviews, Research Methods and Measurement