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  2. List of ecoregions in the United States (EPA) - Wikipedia

    en.wikipedia.org/wiki/List_of_ecoregions_in_the...

    In the United States, the EPA and the United States Geological Survey (USGS) are the principal federal agencies working with the CEC to define and map ecoregions. Ecoregions may be identified by similarities in geology , physiography , vegetation , climate , soils , land use , wildlife distributions, and hydrology .

  3. File:Regions of the United States EPA.svg - Wikipedia

    en.wikipedia.org/wiki/File:Regions_of_the_United...

    A map of the United States showing the 10 regions of the Environmental Protection Agency. Key: Region 1: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont.

  4. File:Map of Southern Plains US ecoregion, Level IV ecoregions ...

    en.wikipedia.org/wiki/File:Map_of_Southern...

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

  5. List of regions of the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_regions_of_the...

    U.S. Census Bureau regions and divisions. Since 1950, the United States Census Bureau defines four statistical regions, with nine divisions. [1] [2] The Census Bureau region definition is "widely used... for data collection and analysis", [3] and is the most commonly used classification system.

  6. Category:Lists of ecoregions in the United States - Wikipedia

    en.wikipedia.org/wiki/Category:Lists_of_eco...

    Pages in category "Lists of ecoregions in the United States" The following 5 pages are in this category, out of 5 total. This list may not reflect recent changes .

  7. List of ecoregions in the United States (WWF) - Wikipedia

    en.wikipedia.org/wiki/List_of_ecoregions_in_the...

    Ecoregions of North America, featuring the 50 United States, the District of Columbia and the five inhabited territories. The following is a list of ecoregions in the United States as identified by the World Wide Fund for Nature (WWF). The United States is a megadiverse country with a high level of endemism across a wide variety of ecosystems.

  8. Vintage photos taken by the EPA reveal what America looked ...

    www.aol.com/2017-10-10-vintage-photos-taken-by...

    The images show what various parts of the country looked like before the air and water protections that exist today.

  9. Category:Ecoregions of the United States - Wikipedia

    en.wikipedia.org/wiki/Category:Ecoregions_of_the...

    Tropical and subtropical grasslands, savannas, and shrublands of the United States (4 P) Tropical and subtropical moist broadleaf forests of the United States (10 P) Pages in category "Ecoregions of the United States"

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