http://www.nytimes.com/2014/01/21/world... http://www.nytimes.com/2014/01/21/world... http://www.nytimes.com/2014/01/21/world... return to California New York Times http://www.nytimes.com/2014/01/21/world... this. http://www.nytimes.com/2014/01/21/world... air quality http://www.nytimes.com/2014/01/21/world... http://www.nytimes.com/2014/01/21/world... New York Times http://www.nytimes.com/2014/01/21/world... Source http://www.nytimes.com/2014/01/21/world... http://www.nytimes.com/2014/01/21/world... China sending pollution to USA over the Pacific return to California New York Times pollution from China is crossing the Pacific http://www.nytimes.com/2014/01/21/world... now reaches California http://www.nytimes.com/2014/01/21/world... http://www.nytimes.com/2014/01/21/world...