Global Air Quality Standards Overview

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This report examines air quality standards across various countries, focusing on pollutants such as PM2.5, NO2, SO2, and O3. It includes a detailed analysis of Ethiopia's PM2.5 baseline data, showcasing annual, monthly, and hourly means from 2017 to 2023. Additionally, it compares Ethiopian data with US Central standards, interpreting differences through various averaging periods and utilizing charts to illustrate pollution patterns effectively.