Health
Household Air Pollution Linked to 3.1 Million Deaths Annually, Study Finds
A new study published in The Lancet has revealed that household air pollution continues to be a major global health threat, contributing to 3.1 million deaths worldwide in 2021. Despite an overall decline in exposure levels, nearly one in three people globally were still affected by indoor air pollution, particularly in lower-income countries.
Health Impacts of Household Air Pollution
Household air pollution is primarily caused by cooking with open fires or stoves that burn kerosene, coal, wood, crop waste, or animal dung. These fuels release fine particulate matter that can enter the bloodstream through the lungs, leading to severe health issues. Researchers found links between household air pollution and various conditions, including lung cancer, stroke, heart disease, type 2 diabetes, chronic obstructive pulmonary disease (COPD), respiratory infections, cataracts, and neonatal disorders.
The study, conducted by the Institute for Health Metrics and Evaluation (IHME), highlighted the alarming impact on children. In 2021, household air pollution was associated with more than 500,000 deaths among children under five, accounting for approximately 11 percent of global under-5 mortality rates.
“The high level of pediatric burden estimated in this study is a major cause for concern,” the researchers stated, emphasizing that the issue has not received sufficient attention from policymakers and researchers.
Regional Disparities in Exposure and Mortality
Between 1990 and 2021, the percentage of people exposed to household air pollution from solid cooking fuels dropped significantly from 56.7 percent to 33.8 percent. However, due to population growth in certain regions, the absolute number of people exposed only fell by about 10 percent, meaning 2.67 billion people still faced dangerous pollution levels in 2021.
Sub-Saharan Africa had the highest exposure rate, with 78.8 percent of its population affected. The number of pollution-related deaths in the region also increased from 685,000 in 1990 to 741,000 in 2021. South Asia recorded the second-highest exposure rate at 53.2 percent. By contrast, central and eastern Europe and central Asia had significantly lower exposure levels at 7.5 percent, while high-income countries reported only 0.4 percent of their populations affected.
Call for Action: Transition to Cleaner Energy
Researchers stress the urgent need to help under-resourced communities transition to cleaner energy sources to mitigate the health risks of household air pollution. Proposed measures include investing in new technologies, subsidizing clean energy appliances, enforcing emissions restrictions, encouraging private sector investment, and launching public awareness campaigns.
“Such initiatives are crucial for mitigating health risks and promoting sustainable development, ultimately improving the quality of life and health outcomes for millions of people,” the study authors emphasized.
The findings highlight the continued urgency of addressing indoor air pollution, particularly in regions where reliance on solid fuels remains high. Governments and international organizations are being urged to accelerate efforts to provide clean energy solutions to vulnerable populations.
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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