Last week, Breathe Cities released a new study examining air quality trends across 96 climate leadership cities – which represent one twelfth of the world’s population and one quarter of the global economy. These cities span Europe, North America and Asia.

In its findings, it identified 19 cities, including Brussels, that achieved „remarkable reductions” of at least 20% in both fine particulate matter (PM2.5) and nitrogen dioxide (NO2) over the past 15 years, in some cases achieving reductions of around 45%.

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