Pollution from China alters weather in U.S. West – CBS News. This is the companion piece to Why Buy American: Ecology/Environment. This link shows the pollution in Beijing and a scientist, Kim Prather, at the Scripps Institute of Oceanography in San Diego, feels that this is also altering the weather in California. This is a 2 minute and 39 second video.
(Update 12/2/2014: The video link is still available from CBS News.)