The Delhi half marathon is to go ahead on Sunday despite dire health warnings from doctors after a court in the heavily polluted city refused to order a delay.
An interactive map that makes it possible to check air quality in real time across Europe, where air pollution has been linked to hundreds of thousands of premature deaths every year, went live on Thursday.
The toxic smog that has covered parts of Pakistan for weeks has exposed official torpor over rampant pollution that has killed thousands more people than have died in years of militancy.
Angry parents accused Delhi authorities on Monday of "playing with children's health" as schools reopened despite a fresh surge in pollution to emergency levels.
In the emergency ward of a Delhi hospital, men and women gasp for breath as they wait to be treated for symptoms triggered by the choking blanket of smog that descended on the Indian capital this week.