PM2.5 standards refer to regulatory limits set for particulate matter that is 2.5 micrometers or smaller in diameter, which can penetrate deep into the lungs and even enter the bloodstream. These standards are established to protect public health and the environment from the harmful effects of air pollution caused by fine particulate matter, which can arise from various sources like vehicle emissions, industrial processes, and natural events such as wildfires. Monitoring and adhering to these standards is essential for improving air quality and safeguarding human health.
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