The electronic Environmental and Energy Resources Library's (eERL) mission is to "be the best possible online collection of environmental and energy sustainability resources for community college educators and for their students." The resources in this collection can be accessed through a search box on this page, or through the link to the eERL website. Resources are free to use and the collection can be searched in a variety of ways, including by keyword or by browsing the various topic categories from agriculture to wastewater. This resource is provided by the Advanced Technology Environmental and Energy Center (ATEEC) and is part of the National Science Digital Library (NSDL).