Newshour - Traffic pollution linked to one in 12 child asthma cases - study - ÃÛÑ¿´«Ã½ Sounds

Newshour - Traffic pollution linked to one in 12 child asthma cases - study - ÃÛÑ¿´«Ã½ Sounds

Newshour

Traffic pollution linked to one in 12 child asthma cases - study

New study reveals effect of exposure to nitrogen dioxide, a toxic gas released by vehicles

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