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Why are particulate pollutants smaller than 10 micrometers especially dangerous to human health?
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air pollution control
Even something as simple as breathing can get complicated.
Particulate pollutants with a diameter of 10 micrometers or less are considered especially dangerous to human health because their small size allows them to be inhaled deep into the lungs, where they can become trapped in the lower respiratory system.12
Generally, the smaller the particulate, the more severe its potential health impact. These inhalable particles can trigger inflammation in the lungs, heart, and blood vessels. This exposure is associated with a range of serious conditions, including:2
- Asthma and bronchitis2
- Irregular heartbeat, heart attack, and stroke2
- Increased risk of cancer, as some particulates are known or suspected carcinogens12
- Preterm birth and low birth weight2
Because these particles can bypass the body's natural filtration mechanisms, they pose a significant threat to public health, particularly for children, older adults, and those with pre-existing cardiovascular or respiratory diseases.23