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Asian air pollution 'affects weather in Northern Hemisphere'

15 April 2014 Last updated at 15:54 BST

Air pollution in China and Asia is affecting weather patterns across the Northern Hemisphere, according to a study.

Scientists found that pollutants strengthen storms above the Pacific Ocean - those storms then feed into weather systems in other parts of the world.

The effect was most pronounced during the winter.

Mariko Oi reports.