THE GATHERING STORM – Air pollution in Asia may be changing weather patterns in the United States.

Increasingly intense storms in the United States might have an unexpected origin: Asian air pollution. Researchers from NASA’s Jet Propulsion Laboratory have found that aerosols from across the Pacific strengthen extratropical cyclones—a type of storm system that drives much of our country’s weather.
http://www.onearth.org/earthwire/asia-pollution-us-weather