Health
India Dominates List of Most Polluted Cities as Global Air Quality Crisis Deepens
A new report has revealed that India is home to six of the world’s nine most polluted cities, highlighting the severity of the country’s air quality crisis. The findings, published by Swiss-based air quality database IQAir, analyzed data from 40,000 monitoring stations across 138 countries, identifying India, Chad, Congo, Bangladesh, and Pakistan as having the dirtiest air globally.
The industrial town of Byrnihat in northeastern India was ranked as the most polluted city worldwide, underlining the impact of rapid industrialization and emissions from factories and vehicles.
A Global Crisis: 83% of Cities Fail Air Quality Standards
The report painted a grim picture of global air pollution, revealing that only 17% of cities worldwide meet air quality guidelines set by the World Health Organization (WHO). Experts warned that actual pollution levels could be even worse, as vast regions, particularly in Africa, lack adequate monitoring infrastructure.
Currently, Africa has only one air quality monitoring station for every 3.7 million people, making it difficult to assess the true extent of pollution. However, progress is being made, with 8,954 new monitoring locations and nearly 1,000 additional sensors deployed in the past year to improve air quality tracking.
Despite these advancements, efforts to monitor pollution suffered a setback last week when the US State Department announced it would stop publicly sharing air quality data from its embassies and consulates worldwide. This move could impact the ability of researchers and policymakers to track pollution levels in some of the world’s most affected regions.
Health Risks of Air Pollution: A Silent Killer
Long-term exposure to polluted air is linked to a range of severe health issues, including respiratory diseases, Alzheimer’s, and cancer, according to Fatimah Ahamad, chief scientist at Malaysia-based Sunway Centre for Planetary Health.
The WHO estimates that air pollution causes around 7 million deaths annually, making it one of the leading environmental health threats.
Ahamad emphasized that urgent action is needed to tackle air pollution, pointing out that nearly 99% of the world’s population lives in areas failing to meet recommended air quality standards.
“If you have bad water, you can tell people to wait for a few hours to get clean water. But if you have bad air, you cannot tell people to stop breathing,” she said.
How Cities Are Fighting Back
While the crisis remains severe, some cities have successfully improved air quality through strict regulations and clean energy initiatives.
- Beijing, Seoul, and Rybnik (Poland) have implemented stricter controls on vehicle emissions, power plants, and industrial pollution while promoting public transport and renewable energy.
- In Southeast Asia, the ASEAN agreement on transboundary haze pollution aims to curb pollution from forest fires, though its success has been limited so far.
Air Pollution and Climate Change: A Common Battle
Shweta Narayan, a campaign lead at the Global Climate and Health Alliance, stressed that regions with the worst air pollution are often the same places where large amounts of greenhouse gases are emitted from burning coal, oil, and gas.
“Air pollution and climate change are two sides of the same coin,” Narayan said, adding that reducing fossil fuel use would not only slow global warming but also improve air quality and public health worldwide.
Health
World Cup Emotion Can Strain the Heart, Cardiologists Warn Fans at Risk
As the World Cup begins, medical experts are cautioning football fans with underlying heart conditions that the emotional intensity of matches can place unexpected strain on the cardiovascular system.
Cardiologists say that the excitement, tension, and anxiety generated during high-stakes games can trigger physical reactions similar to intense exercise, raising heart rate, blood pressure, and stress hormones.
“Intense emotions, whether positive or negative, can act as ‘precipitating risk factors’ for cardiovascular events such as heart attack,” said Paola Santalucia, a cardiologist and board member of the European Heart Network.
She explained that moments of extreme excitement, such as a decisive penalty shootout or a last-minute goal, may pose risks for people already living with heart disease. Those with additional risk factors, including hypertension, obesity, or smoking habits, are also advised to be cautious during emotionally charged matches.
Research using wearable devices has shown that during major football events, some fans experience heart rates climbing as high as 150 beats per minute. That level is comparable to sprinting and reflects how strongly the body reacts to emotional stress.
A study examining supporters during the 2025 German Cup final found that even watching from home can significantly affect physiological responses. “They still had an increase in heart rate that compares to walking, even though they didn’t walk,” said Christian Deutscher, professor of sports economics at Bielefeld University and co-author of the study.
He noted that the most intense reactions often occur not during goals themselves, but during moments of uncertainty such as VAR checks, penalty shootouts, or shots striking the post. These unpredictable situations, he said, are what drive the strongest emotional and physical responses among fans.
Deutscher also pointed out that stadium spectators may experience even greater strain due to environmental factors such as heat and alcohol consumption.
However, experts emphasize that football itself is not inherently dangerous. Instead, it is the body’s natural response to excitement that can create temporary stress.
“The adrenergic stimulation is at its max: extreme high blood pressure, high heart rate, and adrenaline, cortisol, skyrocketing,” said Dan Atar, professor of cardiology at Oslo University Hospital. In rare cases, he added, this surge can contribute to the rupture of arterial plaque in vulnerable individuals, potentially leading to a heart attack.
Atar stressed that such events can occur in everyday situations as well, including physical exertion like shoveling snow. “It is in no way dangerous to watch a football game,” he said. “All this is physiologic. It’s not dangerous to be excited.”
Still, he acknowledged that combining emotional stress with alcohol, heat, and pre-existing conditions can increase risk for some viewers.
Doctors advise those at higher risk to continue prescribed medications, limit alcohol intake, avoid smoking, and watch for warning signs such as chest pain or irregular heartbeat.
“The key message is not to avoid enjoying the match, but to do so with moderation and awareness,” Santalucia said.
Health
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Health
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