its merger, Zepheira continues to operates as an independent division. Products Databases: EBSCO provides a range of library database services. Many of the databases, such as MEDLINE and EconLit, are licensed from content vendors. Others, such as Academic Search, America: History and Life, Art Index, Art Abstracts, Art Full Text, Business Source, Clinical Reference Systems, Criminal Justice Abstracts, Education Abstracts, Environment Complete, Health Source, Historical Abstracts, History Reference Center, MasterFILE, NetLibrary, Primary Search, Professional Development Collection, and USP DI are compiled by EBSCO itself. EBSCO can be configured to route to open access publications through Unpaywall data. Discovery: This product is used to create a unified, customized index of an institution's information resources, and a means of accessing all the content from a single search box. The system works by harvesting metadata from both internal and external sources, and then creating a preindexed service. eBooks: EBSCO provides ebooks and audiobooks across a wide range of subject matter. EBSCO reports that their database includes over a million ebooks and 90,000 audiobooks from over 1500 publishers. DynaMed Plus is a clinical reference tool for physicians and other health care professionals for use at the point-of-care. In 2012, it ranked highest among 10 online clinical resources in a study in the Journal of Clinical Epidemiology and also had the highest overall performance in the disease reference product category in two successive reports on clinical decision support resources by KLAS, a research firm that specializes in monitoring and reporting the performance of healthcare vendors. It provides DRM-protected audio and DRM-protected audiobooks through its subsidiary NetLibrary, which was purchased in 2010 from Online Computer Library Center. It competes in this market with OverDrive's Digital Library Reserve. Green and philanthropic initiatives EBSCO has two large solar electric arrays, is converting its corporate fleet of cars to hybrids, has established a "Green Team" at its headquarters, and has released GreenFILE, a free database designed to help people research the impact humans have on the environment. EBSCO was awarded a 2008 Environmental Merit Award Award from the United States Environmental Protection Agency's New England Office and was honored by the Special Library Association as "Green Champions" as part of the association's "Knowledge to Go Green" initiative on Earth Day 2009. EBSCO philanthropic initiatives include efforts to bridge the digital divide (between the industrialized world and developing nations) and work with the Open Society Foundations to provide essential research