Political apathy over the poisonous smog choking India's capital has led many like businessman Kamal Meattle to take matters into their own hands, with an office building he says pumps air as fresh as from the Swiss Alps.
Schools were closed for a fourth straight day in Tehran on Wednesday as dangerous air pollution covered the Iranian capital and traffic restrictions failed to clear the thick smog.
Unprecedented scenes of Sri Lankan cricketers wearing face masks have reignited debate about hosting major sports in heavily polluted New Delhi, where doctors are increasingly vocal about the health risks posed by smog.
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.
India's environment minister has said the country's filthy air is no cause for alarm, claiming only "routine precautions" were needed to cope with what doctors have called a public health emergency.
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.
India's smog-choked capital has called off a plan to restrict private vehicle use after the country's top environmental court ruled women, VIPs and two-wheelers could not be exempt.
Schools closed across large swathes of north India on Thursday as pollution hit hazardous levels for the third day, with growing calls for urgent government action to tackle what doctors are calling a public health emergency.
Delhi authorities ordered all schools to shut on Wednesday after choking smog descended on north India and Pakistan, with pollution levels in the city 40 times the World Health Organization's safe limit.
A public health emergency was declared as choking smog blanketed New Delhi on Tuesday, with authorities ordering the temporary closure of all primary schools in the world's most polluted capital city.