Bioethics Information Resources National Library of Medicine web site that provides consumer and scholarly information through Medline searching, NLM catalog, and links to major bioethics research centers.
Princeton Economics Research Guide Both the guide to Environmental Economics and the subheading Environmental/Energy Economics in the FAQ list sources of environmental data. Search the FAQ for keywords such as "agriculture," "medicine," etc.
Science.gov Links to U.S. government science databases and websites.
Scirus Search engine for science-only web sites, institutional repositories, scientists' homepages.