Five million masks are being distributed at schools in India’s capital, Delhi, after pollution made the air so toxic officials were forced to declare a public health emergency.
A Supreme Court mandated panel imposed several restrictions in the city and two neighbouring states, as air quality deteriorated to “severe” levels.
All construction has been halted for a week and fireworks have been banned.
The city’s schools have also been closed until at least next Tuesday.
Delhi’s Chief Minister Arvind Kejriwal said Delhi had been turned into a “gas chamber”.