{"id":192543,"date":"2025-12-19T23:28:20","date_gmt":"2025-12-19T23:28:20","guid":{"rendered":"https:\/\/www.newsbeep.com\/nz\/192543\/"},"modified":"2025-12-19T23:28:20","modified_gmt":"2025-12-19T23:28:20","slug":"cities-may-look-clean-but-this-air-pollution-report-says-otherwise","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/nz\/192543\/","title":{"rendered":"Cities may look clean, but this air pollution report says otherwise"},"content":{"rendered":"

Polluted air contributed to 7.9 million deaths worldwide, or about one in every eight deaths. Those numbers come from the State of Global Air 2025 report<\/a>, which tracks how breathing dirty air harms people in every region.<\/p>\n

The work was led by Michael Brauer, a health scientist at the Institute for Health Metrics and Evaluation and the University of British Columbia (UBC<\/a>).<\/p>\n


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His research focuses on how everyday exposure to polluted air drives patterns of disease and early death around the world.<\/p>\n

The report uses the Global Burden of Disease, a worldwide study<\/a> linking illness to shared risk factors. The report notes that the 2023 assessment is described as the most comprehensive version produced since the project began in 1993.<\/p>\n

Across all ages, the 2025 report counts 232 million healthy years of life lost to air pollution in a year. Most of that burden comes from noncommunicable diseases, lasting conditions like heart disease and stroke that account for about 86 percent of pollution deaths.<\/p>\n

Healthy years of life lost combine the time people die earlier than expected with years spent living with disease or disability.<\/p>\n

For a city health department, that measure translates pollution<\/a> into hospital visits, medications, missed school days, and workers who cannot stay on the job.<\/p>\n

How air pollution harms the body<\/p>\n

Scientists focus on PM2.5, tiny airborne particles smaller than 2.5 micrometers across that can travel deep into the lungs and bloodstream. This form of fine particulate pollution alone contributed<\/a> to 4.9 million deaths in the span of a year.<\/p>\n

Long-term exposure to PM2.5 raises the risk of ischemic heart disease, reduced blood flow to the heart muscle, and stroke.<\/p>\n

These conditions can lead to chest pain, heart attacks, and sudden death when polluted air keeps irritating blood vessels year after year.<\/p>\n

The air quality guideline<\/a>, a World Health Organization limit for long-term PM2.5 exposure, sets safe levels at 5 micrograms.<\/p>\n

SGA estimates that roughly 99 percent of people worldwide now breathe PM2.5 at levels above that guideline.<\/p>\n

When polluted air is inhaled, particles can move from the lungs into the bloodstream, reaching the heart, brain, and other organs.<\/p>\n

The estimated link is that exposure leads to about 626,000 dementia deaths and 11.6 million lost years of brain function in older adults.<\/p>\n

How your city stacks up<\/p>\n

Behind the global averages sit detailed maps that estimate pollution levels for every country and many cities. Typing a city name into that online tool<\/a> reveals annual pollution levels and estimated deaths linked to dirty air there.<\/p>\n

In these data, low income and middle income countries account for about 90 percent of all deaths the report attributes to air pollution<\/a>.<\/p>\n

That imbalance reflects both higher pollution levels and weaker access to health care, especially for older adults and young children.<\/p>\n

About one third of people live where PM2.5 levels exceed an interim target of 35 micrograms per cubic meter set in the report.<\/p>\n

It also finds that roughly 11 percent of the global population lives in countries that still have no national air quality standards at all.<\/p>\n

Many high-income cities have reduced smog, yet the report still places them above the World Health Organization guideline once averages are calculated.<\/p>\n

A city that sits under its own legal limit can still have pollution more than double the health-based level set by global experts.<\/p>\n

Cleaning up air pollution<\/p>\n

Air pollution is linked to chronic illnesses such as ischemic heart disease, stroke, lung cancer, diabetes, and dementia.<\/p>\n

It also contributes to chronic obstructive pulmonary disease, a long-term condition that makes breathing difficult and can leave people short of breath even at rest.<\/p>\n

Decades of evidence show that strong regulations can make a difference, as cities that switched to cleaner fuels and reduced coal based power have seen notable drops in pollution<\/a>.<\/p>\n

The same analytical tools used by public health researchers can track whether bus networks, low emission zones, or clean cooking programs lead to measurable improvements.<\/p>\n

For individuals, staying informed begins with checking the local air quality index, a color-coded scale that shows daily pollution levels. <\/p>\n

When levels rise, small choices like taking quieter routes or using a well-fitting mask can help lower exposure.<\/p>\n

Recent estimates reveal that even clean-looking cities may have unhealthy air that carries hidden risks. These findings help residents and local leaders understand where their communities stand and how quickly pollution<\/a> levels need to improve.<\/p>\n

\u2014\u2013<\/p>\n

Like what you read? Subscribe to our newsletter<\/a> for engaging articles, exclusive content, and the latest updates.<\/p>\n

Check us out on EarthSnap<\/a>, a free app brought to you by Eric Ralls<\/a> and Earth.com.<\/p>\n

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