In North America, California cities are among the worst for pollution, yet the overall PM2.5 levels in the U.S. have dropped by 22% from the previous year, thanks to robust air quality monitoring systems.

Despite improvements, significant data gaps in air quality monitoring persist, particularly in Asia and Africa, exacerbated by the U.S. ending its global monitoring efforts.

Air pollution remains a leading environmental health risk, responsible for an estimated 8.1 million premature deaths globally in 2021, according to the 'State of Global Air 2024' report.

The Association of Southeast Asian Nations has made efforts to tackle transboundary haze pollution, but progress has been limited despite commitments from ten countries.

Germany's Environmental Agency claimed compliance with European air quality standards for 2024, yet critics argue these standards are outdated and do not align with WHO recommendations.

In contrast, several countries such as Australia, New Zealand, and Iceland successfully meet WHO air quality standards, while Germany has been noted for exceeding these limits.

Cities like Beijing and Seoul have demonstrated that air quality can be significantly improved through stricter pollution regulations and investments in cleaner energy and public transport.

A recent report by IQAir reveals a troubling statistic: only 17% of cities worldwide meet air pollution guidelines, which means the majority of the global population is breathing polluted air.

The report advocates for increased government funding for renewable energy and stricter emission limits, emphasizing the urgent need for action to protect public health.

Chad has been identified as the most polluted country in 2024, with an alarming average PM2.5 level of 91.8 µg/m³, largely due to desert dust from the Bodélé depression, followed closely by Bangladesh, Pakistan, the Democratic Republic of the Congo, and India.

Experts, including Shweta Narayan from the Global Climate and Health Alliance, highlight the link between air pollution and climate change, advocating for reduced fossil fuel emissions to enhance air quality.