South Asia is the global hotspot for air pollution. Can this deadly problem be fixed?
Authorities in India's capital have shut schools, halted construction and banned non-essential trucks from entering the city after air pollution shot up to its worst level this season. Residents of New Delhi choked in a blanketing toxic smog as worsening air pollution surged past 60 times the World Health Organization's (WHO) recommended daily maximum.
So, why is this happening? And can the annual toxic smog in India, Pakistan and Bangladesh be stopped?