GreenFILE offers well-researched information covering all aspects of human impact to the environment. Its collection of scholarly, government and general-interest titles includes content on global warming, green building, pollution, sustainable agriculture, renewable energy, recycling, and more. The database provides indexing and abstracts for more than 384,000 records, as well as Open Access full text for more than 4,700 records.
The Ohio State University College of Food, Agriculture, and Environmental Sciences.
Science Online 
Science Reference Center 
Topics covered in this resource include biology, chemistry, earth and space science, environmental science, health and medicine, history of science, life science, physics, science and society, science as inquiry, scientists, technology and wildlife. Designed to meet every student researcher's needs, Science Reference Center contains full text for hundreds of science encyclopedias, reference books, periodicals and other sources.
"In addition to searching more than 167 million science-specific web pages, Scirus covers 18 million full-text articles and abstracts from journal sources that include Medline, ScienceDirect, BioMed central, and preprint archives." Library Journal
TOPICsearch contains full text for over 150,961 articles from 475 diverse sources including international and regional newspapers, EBSCO's unparalleled collection of periodicals, biographies, public opinion polls, book reviews, pamphlets, and government information.