Online Access
http://www.epa.gov/students/homework.html#ecoAbstract
Here are links to EPA and non-EPA resources to help students learn more about the relationship between biological communities and their physical environments. Topics covered include endangered and threatened species, oil spills, biomes, and watersheds. Educational levels: High school, Middle schoolType
Service:ClearinghouseIdentifier
oai:worldagroforestry.org:DLESE-000-000-001-782http://www.epa.gov/students/homework.html#eco