Deadly New Delhi Air Pollution Keeps Getting Worse

At certain times of year, some immense cities in the world become cesspools of extreme air pollution, putting the lives of millions of people in danger.

Extreme air pollution in India this past week. Photo by Arushree
Fadnavis./Reuters

In recent days, New Delhi, India has probably topped them all. The pollution was so thick, so dangerous, that you couldn't measure it.

A widely used air qualilty index measures ground level ozone, particulates, carbon monoxide, sulfer dioxide and nitrogen dioxide.  If the index is at 50 or lower, the air is clean and great to breath.

Up to 300, the air is a bit iffy - unhealthy for people with underlying health issues or other sensitivities, but the rest of us can probably manage, though with some potential health effects. If you get over 300, the air is downright dangerous for everybody.

We don't know how high the air quality index got in New Delhi, because the measuring devices only go to 999. I imagine the pollution levels were at least four times higher than what is considered dangerous for everybody.

 Here's how Time magazine describes what this is like:

"By one estimate, breathing Delhi's air for one day has the health impacts of smoking at least 25 cigarettes. Although Delhi typically experiences marked increases in air pollution around Novermber, this year's pollution prompted Delhi's Chief Minister, Arvind Kejriwal to call the city a 'gas chamber.'"

Time says New Delhi's experience with air pollution is part of a global trend that is causing roughly 7 million premature deaths annually.

Inversions, in which warm air traps cooler air beneath it, is the root meteorological cause of these pollution episodes. That warm air aloft acts as a lid so that pollutants can't escape and blow away. As cars, trucks, agricultural fires, factories and everything else loft stuff into the air, it just accumulates under this "lid," with toxic results.

In New Delhi's case, it started with an annual celebration called Diwali, in which lots of people set of fireworks. Those add a lot of smoke to the air.

This is also the time of year that farmers in land surrounding New Delhi to set fires in fields to clear land for the next round of crops.  Add to it the millions of cars, trucks, factories and scooter and you get a real disaster.

By the way, we here in Vermont are not immune from pollution problems caused by inversions.  These inversions often happen in the winter.  That can trap pollutants from things like cars and wood stove smoke in our Green Mountain valleys, elevating pollution levels.

The area around Rutland, for instance, is shaped like a bowl, and is sometimes subject to wintertime air pollution alerts. Of course, and thankfully, Rutland will never get as bad as New Delhi.

New Delhi, India, Choking In Toxic Smog

Thick smog in New Delhi this month. Photo by Altaf
Qadri/Associated Press

In 1952, a deadly smog enveloped London, England.   

In those days, coal and polluting fuels heated homes and businesses and basically powered the city.

During one of those famous London fogs, all those pollutants got trapped within the fog, causing a four-day dense cloud of smog that killed an estimated 4,000 people.

London has literally cleaned up its act, and pollution there rarely gets to dangerous levels.

Not so in other cities in the world.  Beijing, China is famous for its toxic pollution.

So is New Delhi, India, which is now enveloped in a smog so bad that it's being compared to that terrible London smog of 1952.

The smog cloud in New Delhi, like most pollution outbreaks is caused by an inversion, which is warm air over the top of cooler air that acts like a lid, preventing pollutants and smoke and such from rising and moving away. So it sits there.

Illegal crop burning at farms surrounding New Delhi, vehicle emissions and construction activity and dust are pouring into the New Delhi air, and the pollutants keep accumulating under this inversion.

The Straights Times says New Delhi is trying to deal with the immediate crisis by reducing the number of cars allowed to be driven on its streets each day, banning commercial trucks unless they're carrying essential commodities, new construction has been stopped and charges for parking cars has quadrupled to force people into public transportation. Schools are shut down.

But that's not really doing the trick. There has been a 20 percent spike in hospitalizations due to heart and lung problems. The amount of microscopic particles in the polluted air is 75 times what the World Health Organization considers safe. Breathing the air is the equivalent of smoking two packs of cigarettes per day. 

And this pollution attack isn't a one-off. It's happening with increasing frequency in New Delhi and other cities in India and elsewhere in Asia.

And remember how I said London and England's air is cleaner? That's true, but it's still too polluted even there. Of 51 British towns and cities in a WHO database, 44 have too much air pollution, the Independent said.

Meanwhile, in the United States, air quality has also improved since the 1960s and 1970s but still sometimes falls short.

Don't expect even cleaner U.S. air in the coming years. Robert Phalen is an appointee to a Trump White House environmental panel. Phalen has said that "Modern air is a little too clean for optimum health."

He claims that children should be exposed to some dirty air to teach their immunie systems to ward off irritants, or something like that.

Hope you love breathing microscopic, toxic particles, folks!