Cycling in the air, the deadliest in Europe

Some European cities suffer from the worst air quality in the world.

Winter smog has become a major problem in the Western Balkans.

Serbia is the country with the highest rate of pollution-related deaths in Europe, according to the Global Alliance for Health and Pollution.

Jasna Cizler is a bicycle activist in the capital, Belgrade, who believes that two-wheeled traffic is the key to clean air.

Produced by Guy Delauney

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