Reuters has created several data visualizations illustrating how Delhi’s air quality declines in the winter as temperatures and wind speed decrease. Hazardous air particles such as dust, dirt, and smoke remain closer to the ground in the colder weather and lower wind speeds trap the pollutants in Delhi. Crop burnings, which are a common practice in Delhi because they are an inexpensive way to prepare an area for new crops, exacerbate the pollution. The visualizations show that one monitoring station only recorded two hourly readings of “good” or “moderate” air quality during the months of October and November, while all other readings at the station ranged from “unhealthy for sensitive groups” to “hazardous.”
Visualizing How Delhi’s Air Quality Becomes Hazardous in the Winter
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