February 26, 2024

A few steps into his early-morning run, Purushottam Sahu struggled to breathe. He started coughing. He felt as if he might vomit.

Overhead, a thick brown-gray haze blanketed the sprawling forest park in New Delhi where he and other joggers, yoga enthusiasts and dog owners were keeping to their daily habits despite official warnings against exerting themselves in the toxic air.

“We are all jogging faster toward death,” said Mr. Sahu, 46. “Because we have no other choice.”

Every year in the late fall, as air pollution in the Indian capital climbs to noxious extremes, the government takes emergency measures like closing schools, restricting traffic and banning construction. But for the region’s 30 million inhabitants, life must go on, and for many in this urban expanse of lush parks and morning strolls, that means trying to remain active.

For them, the calculation is that staying inside and skipping exercise — altering routines and forgoing the socializing that comes with them — is worse than going out and breathing poison.

Delhi’s skies began their annual descent into darkness more than a week ago, after farmers in neighboring agrarian states started burning rice stubble. The air pollution problem, which is also related to factors like falling temperatures, vehicle exhaust and coal-fired power plants, has persisted as politicians have approached the issue mostly as something to fight over.

Concentrations of cancer-causing micro-particles that enter the bloodstream through the lungs have soared in recent days to 30 times the danger limit set by the World Health Organization. Athletes in India for the Cricket World Cup have skipped practice sessions because of dense smog. In the past, cricket players have vomited during matches.

Walk through the streets of New Delhi and you can taste the air — a smoky metallic tang, as though you’ve licked ash.

Public health experts say that strenuous exercise can mean deeper breathing and more particles inhaled into the lungs, making outdoor activity dangerous and sometimes even fatal, especially for older people and children. Among the more vulnerable is Mr. Sahu’s 9-year-old son, who follows him on his bicycle every morning.

Doctors say that the number of patients with breathing problems, coughs, or watery and irritated eyes has tripled. To prevent further crowding of the city’s already overburdened hospitals, the authorities have warned residents to avoid outdoor morning and evening walks, running, jogging or any other physical exercise outside.

“It is harmful and dangerous, particularly for elderly people who fill these parks,” said Dr. Ullas Batra, an oncologist at the Rajiv Gandhi Cancer Institute and Research Center in Delhi.

But hardly anyone listens, city park officials said.

Across the capital region, there are about 18,000 parks and gardens that attract hundreds of thousands of people every morning. In interviews, around a dozen of them said they would prefer their morning exercise even as a widely used index of air quality, known as A.Q.I., hovered around a “hazardous” 500, which is the highest measurement on the scale.

“We will be still running when A.Q.I. will be 1,000, and politicians will be blaming each other for failing to do anything,” said Jaipal Tanwar, an organic farmer, who was walking with his wife, Anita, in the forest park known as Sanjay Van. “We are struggling to breathe now, and we will be choking at that time.”

For years, the city’s fitness enthusiasts have resisted any move by officials to scuttle their morning routine. During the coronavirus pandemic, the authorities deployed police officers as people continued to enter parks during a strict lockdown.

On a recent morning, India Gate, a war memorial built by the British, was invisible amid the plumes of toxic haze. Spread around its flat grounds were colorful yoga mats. Older exercisers engaged in intense conversation on domestic politics while making the rounds, and dog owners wandered aimlessly with their headphones on.

At Lodhi Garden, a botanical sprawl in the heart of New Delhi that draws diplomats, government officials and the city’s wealthy residents, two groups led by trainers practiced yoga between coughing fits. Out of 50 people seen practicing yoga or jogging, only one wore a surgical mask. Many said they didn’t care about air pollution.

“Over the years, we have developed immunity against this dirty air,” said Mahesh Arora, a retired government official, who has been going to Lodhi Garden for 40 years for morning workouts. “We have to activate our body every day.”

Conversations during and after morning exercise sessions are often the only way of socializing for older Delhi residents. Mr. Arora, who lives with his wife in an upscale neighborhood, has two daughters in the United States, and they visit only once a year.

So far, emergency efforts by the government have failed to solve the worsening air pollution problem.

On Tuesday, India’s top court said the choking air amounted to the “murder of young people,” adding that efforts by the region’s government could be best described as “mere optics.”

“It is like starting to dig a well when people around are dying of thirst,” said Meenu Vasishth, a yoga trainer in Lodhi Garden. But she also expressed a common skepticism about the toll.

“I don’t think the bad air kills people, either,” she said. “If that was the case, dead bodies would be everywhere in the city.”

While the effects may not be so visible, in reality they are still widespread. In 2019, India had 1.6 million pollution-related premature deaths, the most of any country, according to a report in The Lancet, a British medical journal. Doctors say that in the past decade, the number of lung cancer cases among nonsmokers has skyrocketed.

Mr. Sahu, who was taking his morning run at Sanjay Van, said he had moved to the city for a job 15 years ago and now worked as a software engineer. His daughter has cerebral palsy and goes out only once a week when the air is bad. They live in a neighborhood where rent is low and there are no trees.

That day, his son, Dipesh, soon felt fatigued as he cycled behind him. Within half an hour, they were both done.

“Given a choice, I will pack my bags and leave this city without telling my friends,” Mr. Sahu said. “We are stuck for giving good education to our children, without realizing we are also killing them with poisonous air.”

But he doesn’t use air purifiers at home, he said, saying they limit mobility. “It is like being in an intensive care unit,” he said. “You can’t live there.”

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