Los Angeles-Long Beach, Bakersfield, Fresno-Madera-Hanford, Sacramento-Roseville, San Jose-San Francisco ... trends were the same ones as last year. The methodology for grading the ozone and ...

The annual report, published Wednesday, found 131.2 million Americans live in areas assigned failing grades for particle or ozone pollution ... the San Jose-San Francisco-Oakland area, the ...

The children lived in six cities – Minneapolis; San Francisco ... “We interpret trends, and what we can conclude from this analysis is that when ozone within the air pollution mixture was ...