EBSCO has released a new, free, database for environmental literature. Give it a try!
From the EBSCO press release:
GreenFILE offers a unique perspective on the positive and negative ways humans affect the ecology. The initial release will include abstracting and indexing for more than 600 titles, including comprehensive coverage – from to volume 1, issue 1 to present – for Bioscience (back to 1964), Conservation Biology (back to 1987), Journal of Ecology (back to 1913) and Journal of Environmental Planning & Management (back to 1948). The total number of records is approximately 295,000, and full text is provided for more than 4,600 records from open access titles.