According to the announcement message, GreenFILE indexes scholarly and general interest titles, government documents and reports, concerning the ways humans affect the environment in the areas of agriculture, education, law, health and technology. The database contains nearly 300,000 records, including some full text for selected titles.
I added this database to my library's online resources webpage, but also wanted some more information. I wrote to EBSCO to ask why they are making this available free, and if they have any plans to change this to a subscription database. Here's the response I received:
GreenFILE is a free database we provide in an effort to facilitate research and understanding on matters concerning human impact on the environment. We also offer a free database called Library Information Science & Technology Abstracts which features content that is free on the web but for your convenience we've created a database for it.
Also, for those who don't otherwise use EBSCOhost, this database allows a look at EBSCO's visual search interface.