Delhi has staged a 10K race while pollution levels soar to 16 times above anything considered safe.
The culprit is known as PM 2.5. 60 ppm is considered the maximum safe level. Parts of Delhi have hit 999 ppm. PM 2.5 is especially dangerous because the particles can be absorbed in the lungs and then pass into the bloodstream. From there the particles can breach the blood-brain barrier.
Young people are particularly vulnerable to PM 2.5 pollution and the impacts are widespread. Several recent articles confirm that half of Delhi's school kids have stunted lung development and will never completely recover. It's a story repeated in other Indian mega-cities.
Which raises the question of why organizers went ahead with this 10K race, especially when some of the kids obviously lack even rudimentary face mask protection.