The ALA analyzed the data based on ozone pollution, short-term particle pollution and year-round particle pollution.

FORBES: Life

For that reason Forbes focused on the metros most affected by year-round particle pollution for this list.

FORBES: Magazine Article

The only city in the top 10 to actually get worse in terms of year-round particle pollution levels was Bakersfield.

FORBES: Magazine Article

Not only do commuters in Southern California inhale the worst year-round particle pollution levels, but Riverside drivers also face the highest rate of fatal auto accidents per capita, and Los Angeles drivers spend the most time sitting in traffic.

FORBES: Magazine Article

For pollution levels, we used information from the American Lung Association's "State of the Air: 2007" report, which ranked the most polluted metropolitan areas by year-round particle pollution based on data submitted by states to the U.S. Environmental Protection Agency for 2003-05.

FORBES: ? AP Photo/Don Ryan

The ALA analyzed particle pollution levels two ways: short-term particle pollution, or high spikes in the level of soot and other toxins in the air that last a few hours to a few weeks, and year-round particle pollution, or the annual average of particle pollution levels.

FORBES: List: America's Most Polluted Cities

Five spoke at a press conference last year to announce the discovery of a particle thought to be the Higgs, but it was only Prof Higgs who received a huge round of applause from the researchers present.

BBC: Science correspondent, BBC News

Mr. Higgs received a round of applause as he entered the auditorium, and shed a tear when news of the Higgs-like particle was announced.

WSJ: New Particle Found, Consistent With Higgs Boson