Pollution in Delhi: indoor air is worse than outdoors, study finds
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A mix of factors such as vehicle and industrial emissions, dust and weather conditions make Delhi the most polluted capital in the world. The air becomes especially toxic during the winter months when farmers in neighboring states burn crop stubble. And the fireworks on Diwali, which are happening at the same time, only worsen the air quality. Low wind speed also plays a role as it traps pollutants in the lower atmosphere.
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