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Particulate matter in the air significantly impacts human health, making it a serious concern for air quality. When particulate matter is inhaled, it can penetrate deep into the lungs and even enter the bloodstream, leading to a range of health issues. These include respiratory problems, cardiovascular diseases, and exacerbation of existing health conditions such as asthma. The small size of particulate matter allows it to remain suspended in the air for extended periods, increasing the likelihood of human exposure, especially in urban areas with high traffic or industrial activities. This makes the connection between particulate matter and health problems very pertinent and a critical focus for environmental health standards and policies.

In contrast, increased sunlight, improved visibility, and reduced temperatures are not typically associated with particulate matter; in fact, particulate matter can lead to reduced visibility and has complex interactions with climate that can affect temperatures.