air pollution. Some regions of Europe face far higher pollution risks than others, making them less ideal destinations for travellers.
In 2021, the World Health Organisation (WHO) updated its air quality guidelines, lowering the recommended threshold for annual concentrations of nitrogen dioxide and fine particulate matter (PM2.5) such as dust, smoke, and soot from exhaust.
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Overall, exposure to PM2.5 caused about 239,000 premature deaths in Europe in 2021, while another 48,000 people died as a result of nitrogen dioxide exposure, according to the European Environment Agency.
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Currently, all EU countries report nitrogen dioxide levels above WHO-recommended levels, but some are hit harder by air pollution than others.
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