Why India’s air pollution is so horrendous ( www.vox.com )

Eleven out of the 12 most polluted cities on a World Health Organization list were in India.

India is once again heading into the worst time of year for air pollution, a season where the country’s notoriously poor quality become even more toxic.

Soot, dust, ozone, and sulfur oxides are a growing threat for billions of people around the world. The World Health Organization reported this week that 93 percent of all children in the world breathe air with pollution levels that exceed their guidelines.

A whopping nine in 10 people on Earth breathe highly polluted air, and more than 80 percent of urban dwellers have to endure outdoor pollution that exceeds health standards, according to the WHO’s World Global Ambient Air Quality Database.

But even among countries gasping for breath, India stands out for air that is consistently, epically terrible.

In recent years, the first two weeks of November have brought the worst air pollution of the year to #Delhi, #India.

With daily averages already in the “very unhealthy” range, 2018 seems set to repeat the pattern. #AirQuality pic.twitter.com/Irals60HFS

— Robert Rohde (@RARohde) October 31, 2018

Drawing on measurements and calculations as of 2016 from air monitoring stations in 4,300 cities, the WHO reported in March that India’s cities suffer the most.

When you look at the database’s ranking of particulate pollution in cities, 11 of the 12 cities with the highest levels are located in India. Kanpur, India, population 3 million, tops the list with a yearly average of 319 micrograms per cubic meter of PM2.5, the most hazardous particle commonly measured. (Bamenda, Cameroon, is the one city outside of