As per WHO’s Air Quality Guidelines (AQG), 2021, what is the safe recommended level of Particulate Matter (PM) 2.5 for a 24-hour period?

The World Health Organization (WHO) Air Quality Guidelines (AQG) published in 2021 recommend that the safe level of Particulate Matter (PM) 2.5 for a 24-hour period should not exceed 15 µg/m³ (micrograms per cubic meter). This guideline aims to protect public health by minimizing exposure to harmful levels of air pollution, particularly PM2.5, which can have serious health implications including respiratory and cardiovascular issues.

It's important to aim for these standards to ensure better air quality and protect both individual and community health. The guidelines emphasize the need for stricter air quality management and pollution control measures to reduce PM levels and their associated health risks.