Vehicle Exhaust Filters Do Not Remove “Ultrafine” Pollution — New Study
While the World Health Organization has not yet set a guideline for safe levels of ultrafine particles, it recognizes that particulate pollution overall is associated with negative impacts on cardiovascular and respiratory health. Air quality guidelines published by WHO in 2021 also outline concerns over ultrafine particles and their ability to be transported around the body.
“High concentrations of ultrafine particles are likely to be a widespread and persistent phenomenon. In order to meet WHO guidelines we are likely to need a much higher uptake of electric vehicles, as well as additional measures to reduce emissions from diesel vehicles.” —Professor Roy Harrison, School of Geography, Earth and Environmental Sciences
The data showed a steep decline in larger particles. Black carbon, for example, declined by 81% between 2014 and 2021. This is a clear indication that there has been a positive impact from the introduction of exhaust filters.
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