This document summarizes several air quality measurement and modelling methods that can be used to estimate ground-level air pollutant concentrations and presents multiple approaches to monitoring ambient air pollution at different spatial and temporal scales.

Rising air pollution can cut life expectancy by more than five years per person in South Asia, one of the world’s most polluted regions, according to a report which flagged the growing burden of hazardous air on health.

The Air Quality Management (AQM) system in Tajikistan needs strengthening in its key policy and institutional as well as technical aspects to reduce health impacts of air pollution in the most polluted airsheds (Dushanbe and other urban centers).

Air pollution, a critical global environmental problem, severely threatens human health and well-being. To address this crisis, global stocktaking and transparency is crucial. Measurement, reporting, and verification of emissions are vital, necessitating tools like low-cost sensors and satellite systems.

Rapid population growth, industrialization, and urbanization combined with delayed enactment of environmental policies have led to serious air quality problems across Asia.

Every winter, New Delhi’s Air Quality Index (AQI) becomes a central talking point amongst mainstream media, policymakers, and on social media. However, the issue of toxic air goes beyond the administrative boundaries of Delhi-NCR and affects millions of people – especially those residing in the Indo-Gangetic Plain (IGP).

India has dropped from fifth to eighth place in terms of the world’s most polluted countries in 2022. According to this World Air Quality Report 2022 by the IQAir, out of the 50 most polluted cities in the world, 39 are in India.

This report is part of the Swedish Environmental Protection Agency’s series Air & Environment within the national environmental monitoring programme. The report’s authors include stakeholders active within the national air quality monitoring and researchers and experts at universities, research institutes and public agencies.

This report is a continuation of ‘Tracing the Hazy Air: Progress Report on National Clean Air Programme’ released by the Centre for Research on Energy and Clean Air in January 2022.