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    Report: Polluted Air Puts Millions at Risk

    Led by Los Angeles, Dozens of U.S. Cities Have Unsafe Levels of Pollution

    Pollution's Effects continued...

    American Lung Association President Bernadette Toomey says the group is lobbying Congress to order tougher ozone and particulate standards. "Americans are still being denied the health protection they deserve under the Clean Air Act," she says.

    Efforts to force stricter standards could be part of a congressional debate on global warming expected this summer.

    Business groups lobbied against stricter ozone and particulate standards, saying many companies and utilities aren't required to implement existing standards until 2013.

    "Air quality around the United States continues to improve under the existing standards," says Bryan Brendle, an energy lobbyist for the National Association of Manufacturers, an industry group.

    Ozone: Top 25 Cities

    Here are the top 25 cities for ozone pollution:

    1. Los Angeles-Long Beach-Riverside, CA

    2. Bakersfield, CA

    3. Visalia-Porterville, CA

    4. Houston-Baytown-Huntsville, TX

    5. Fresno-Madera, CA

    6. Sacramento--Arden-Arcade--Yuba City, CA-NV

    7. Dallas-Fort Worth, TX

    8. New York-Newark-Bridgeport, NY-NJ-CT-PA

    9. Washington-Baltimore-Northern Virginia, DC-MD-VA-WV

    10. Baton Rouge-Pierre Part, LA

    11. Philadelphia-Camden-Vineland, PA-NJ-DE-MD

    12. Charlotte-Gastonia-Salisbury, NC-SC / San Diego-Carlsbad-San Marcos, CA / Atlanta-Sandy Springs-Gainesville, GA-AL

    15. St. Louis-St. Charles-Farmington, MO-IL / Beaumont-Port Arthur, TX

    17. Merced, CA

    18. El Centro, CA

    19. Phoenix-Mesa-Scottsdale, AZ

    20. Kansas City-Overland Park-Kansas City, MO-KS

    21. Modesto, CA

    22. Birmingham-Hoover-Cullman, AL

    23. Las Vegas-Paradise-Pahrump, NV

    24. Chicago-Naperville-Michigan City, IL-IN-WI / Hanford-Corcoran, CA / Milwaukee-Racine-Waukesha, WI

    Particle Pollution: Top 25 Cities

    Here are the top 25 cities for particle pollution:

    1. Los Angeles-Long Beach-Riverside, CA

    2. Pittsburgh-New Castle, PA

    3. Bakersfield, CA

    4. Birmingham-Hoover-Cullman, AL

    5.Visalia-Porterville, CA

    6. Atlanta-Sandy Springs-Gainesville, GA-AL

    7. Cincinnati-Middletown-Wilmington, OH-KY-IN

    8. Fresno-Madera, CA / Hanford-Corcoran, CA / Detroit-Warren-Flint, MI /Cleveland-Akron-Elyria, OH

    12. Macon-Warner Robins-Fort Valley, GA

    13. St. Louis-St. Charles-Farmington, MO-IL

    14. Weirton-Steubenville, WV-OH / Charleston, WV

    16. Lancaster, PA / York-Hanover-Gettysburg, PA

    18. Louisville-Jefferson County-Elizabethtown- Scottsburg, KY-IN

    19. Rome, GA / Huntington-Ashland, WV-KY-OH

    21. Augusta-Richmond County, GA-SC

    22. Washington-Baltimore-Northern Virginia, DC-MD-VA-WV / Canton-Massillon, OH / Greenville-Spartanburg-Anderson, SC

    25. Columbus-Auburn-Opelika, GA-AL / Hagerstown-Martinsburg, MD-WV

    Cleanest Cities

    Here are the cleanest cities for ozone pollution, in alphabetical order:

    Albuquerque, NM

    Ames-Boone, IA

    Appleton-Oshkosh-Neenah, WI

    Austin-Round Rock, TX

    Bangor, ME

    Bellingham, WA

    Bloomington, IN

    Bloomington-Normal, IL

    Bowling Green, KY

    Brunswick, GA

    Burlington-South Burlington, VT

    Cape Coral-Fort Myers, FL

    Carson City, NV

    Cedar Rapids, IA

    Champaign-Urbana, IL

    Davenport-Moline-Rock Island, IA-IL

    Decatur, IL

    Des Moines-Newton-Pella, IA

    Duluth, MN-WI

    Elmira, NY

    Eugene-Springfield, OR

    Fargo-Wahpeton, ND-MN

    Florence-Muscle Shoals, AL

    Gadsden, AL

    Gainesville, FL

    Hickory-Lenoir-Morganton, NC

    Honolulu, HI

    Lafayette-Frankfort, IN

    Laredo, TX

    Lexington-Fayette--Frankfort--Richmond, KY

    Lincoln, NE

    Logan, UT-ID

    Medford, OR

    Montgomery-Alexander City, AL

    Naples-Marco Island, FL

    Ocala, FL

    Omaha-Council Bluffs-Fremont, NE-IA

    Peoria-Canton, IL

    Port St. Lucie-Sebastian-Vero Beach, FL

    Rapid City, SD

    Reno-Sparks-Fernley, NV

    Roanoke, VA

    Rochester, MN

    Rochester-Batavia-Seneca Falls, NY

    Rockford-Freeport-Rochelle, IL

    Salinas, CA

    Savannah-Hinesville-Fort Stewart, GA

    Sioux Falls, SD

    Spokane, WA

    Springfield, IL

    Utica-Rome, NY

    Waterloo-Cedar Falls, IA

    Wilmington, NC

    Yuma, AZ

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