Millions of people across northern India and Pakistan have spent the past few weeks under a blanket of toxic smog, enduring some of the region’s worst air quality ever recorded. The sky is filled with particulates from the seasonal burning of rice-paddy stubble on nearby farms, mixed with other vehicular and industrial emissions. Several health emergencies have been declared, many schools have been closed, and residents are being encouraged to stay indoors. To receive an email notification every time new photo stories are published, sign up here….