air quality, most polluted cities

Only 17% of global cities had safe air in 2024, air quality report finds
The IQAir World Air Quality Report, which analysed data from over 40,000 air quality monitoring stations across 8,954 locations in 138 countries, found that only 17 per cent of cities met the World Health Organisation’s (WHO) annual PM2.5 guideline of 5 micrograms per cubic metre (µg/m³).
Map Shows US Cities With Worst Air Pollution
A new report has shed light on the locations of the most polluted cities in the U.S. On Tuesday, IQAir, a Swiss tech company that tracks global air quality, released the report, which evaluated the state of global air quality based on fine particulate matter,
State Department halts global monitoring of air pollution
The program had used sensors at more than 80 U.S. embassies and consulates to track air quality, mostly in places where such data was unavailable.
India has six of the world's 10 most polluted cities, report shows
Chad in central Africa is the world’s most polluted country, while California has the worst air pollution in North America, according to an IQAir report.
India's air quality improves slightly in 2024, yet six cities remain among world's worst polluted
India saw a seven per cent decline in PM2.5 levels in 2024, but six of the world's ten most polluted cities were still in the country, according to the IQAir 2024 World Air Quality Report. India's annual PM2.
With 13 of 20 most polluted cities, India ranks 5th globally
India ranked as the fifth most polluted country worldwide in 2024, with Byrnihat in Meghalaya being the most polluted metropolitan area globally. High pollution levels are linked to rapid industrialisation and unregulated emissions.
Smog bound Indian cities dominate global pollution rankings: report
Despite an improvement in 2024, India again dominated global rankings for the cities with the most dangerous particle smog while Chad was the most polluted country, according to a report published Tuesday.
Particulate matter levels in air exceed WHO limits in majority of world's big cities
Fewer than one in five global cities met World Health Organization air pollution standards in 2024 with Central and South ...
Trump takes an ax to more than a dozen pollution rules in rapid-fire deregulation
The Trump administration is rolling back several major climate policies, including two rules that target planet-warming ...
What cuts to global air monitoring could mean for the U.S. — and other countries
The U.S. State Department said it would stop publishing global air pollution data as part of attempts to shrink federal spending. The program set a worldwide standard for measuring air quality. NPR's ...
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Majority of the world's population breathes dirty air, report says
BENGALURU, Karnataka — Most of the world has dirty air, with just 17% of cities globally meeting air pollution guidelines, a report Tuesday found. Switzerland-based air quality monitoring ...