PM 2.5

Modeling traffic congestion effects on air pollutants

Air pollution is universally recognized as one of the most pressing environmental challenges in the Asia-Pacific region. In recent years, this impact has risen at an alarming rate and has resulted in an increased premature death and threatened the livelihoods and sustainable development in region. This trend is expected to …

Methodology to develop city-level, science-based, air-pollution action plans

It is universally recognized that air pollution is a pressing environmental challenge that has increased considerably in recent years, leading to a rise in premature deaths, threatening livelihoods, and the sustainable development of the region. In particular, many cities in Asia and the Pacific where air pollution is a major …

Air pollution and management: brief introduction

The deteriorating quality of air, transboundary haze pollution and global climate change are the major problems affecting the atmospheric ecosystem. Air quality has deteriorated as a result of increasing traffic congestion, rapid industrialisation and increased energy consumption. Tackling air pollution in the Asia and Pacific region is of utmost urgency, …

Mapping air pollution in Bengaluru using low-cost sensors and mobile monitoring data

To effectively manage air pollution, need to measure it accurately and at high spatial resolution. However, maintaining a dense network of regulatory instruments is financially and technically burdensome for low- and middle-income countries. A hybrid approach that combines non-conventional, less expensive, short-term stationary, and mobile deployments may be a cost-effective …

2022 world air quality report

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. The 2022 World Air Quality Report reviews …

Air pollution in Bangkok: addressing unequal exposure and enhancing public understanding of the risks

This brief reports the findings of a study that examined the relationship between air-pollution exposure, socio-economic status, and working and living conditions in Bangkok. It provides an overview of the study and highlights six recommendations to address related issues. The authors conducted a study that explored air-pollution exposure levels and …

Air quality in African cities

This report contains a comparative analysis of five African cities in terms of their air pollution problem, as well as their attempts to manage and improve air quality. Also included is an analysis of the impact of counter measures to the COVID-19 pandemic in 2020 and 2021 in those cities, …

Air pollution and climate change: from co-benefits to coherent policies

Achieving carbon neutral development will take a roughly 40-year-long structural transformation, especially in developing and emerging economies, where most people exposed to poor air quality live. In the meantime, 6-7 million people die each year by breathing polluted air. But does climate action always lead to better air quality? Likewise, …

Breathing heavy: new evidence on air pollution and health in Bangladesh

Air pollution was the fourth-leading risk factor for premature mortality globally in 2019, causing an estimated 6.67 million deaths (HEI 2020). A large majority of such deaths were caused by ambient, outdoor air pollution due to inhalation of fine particulate matter (PM2.5) (World Bank 2020). While most individuals are susceptible …

A practical guide for business air pollutant emission assessment

A first-of-its-kind guide for businesses to measure air pollutant emissions across value chains. Developed by the CCAC, Stockholm Environment Institute, and IKEA Group, this guide enables companies to quantify the air pollutant emissions along their value chains. The guide enables businesses to create a global overview of their air pollution …

Bending Delhi’s air pollution curve: learnings from 2020 to improve 2021

The study intends to support the Delhi government, the Central Pollution Control Board (CPCB), and the Delhi Pollution Control Committee (DPCC) in identifying priority areas of interventions needed in controlling air pollution in Delhi during the winter season of 2021. It establishes the primary drivers of Delhi's winter air pollution …

The state of air quality and health impacts in Africa

Nearly all the African continent faces severe health impacts caused by air pollution, with several countries experiencing some of the highest levels of air pollution in the world, according to this new HEI report. The report, The State of Air Quality and Health Impacts in Africa, provides a comprehensive analysis …

Delhi records lower PM 2.5 levels on the day after Diwali, but it continues to be above safe limits

Each year, air pollution levels spike in the Indo-Gangetic Plain on the day after Diwali with grey skies and hard-to-breathe air. This results from several meteorological factors, the stubble burning in neighbouring states and increased local emissions due to the firecracker use. Analysis by the NCAP Tracker of data from …

Air pollution and the world of work: policies, initiatives and the current situation – a scoping and evidence review for Southeast and East Asia

This scoping report synthesizes the authors’ initial work to understand the differentiated impacts of air pollution on workers in East and Southeast Asian countries and to identify evidence-based recommendations from regional case studies to help improve air quality and foster healthy employment in the context of just transitions towards a …

Report of the Comptroller and Auditor General of India on performance audit of air pollution control by Government of Gujarat

Three new cities — Surat, Rajkot and Vadodara — have been added to the list of Critically Polluted Areas (CPA) in Gujarat while Odhav, Naroda (in Ahmedabad), Bhavnagar and Junagadh have been removed from the list, stated the Comptroller and Auditor General of India (CAG) in a report tabled in …

WMO air quality and climate bulletin 2022

The WMO Air Quality and Climate Bulletin reports annually on the state of air quality and its connections to climate change, reflecting on the geographical distribution of and changes in the levels of traditional pollutants. The present edition of the WMO Air Quality and Climate Bulletin provides an update on …

Air quality and health in cities: a state of global air report 2022

India is home to 18 of the 20 cities with the most severe increase in fine particle pollutants or PM2.5 from 2010 to 2019, according to this comprehensive and detailed analysis of air pollution and global health effects for over 7,000 cities, published by the Health Effects Institute (HEI). This …

Financing, technology, and inter-state coordination: imperatives for cleaning India’s air

Air pollution is a global environmental threat, and a cause of significant proportions of diseases and premature deaths. The threat is massive in India, which continuously fails to meet World Health Organization (WHO) standards and is home to 21 of the 30 most polluted cities of the world. Air pollution …

Health effects of short and long-term air pollution exposure: evidence from a survey of residents living in rural and urban regions near Kolkata

A first-of-its-kind study generates evidence on the health impacts of air pollution amongst varying segments of the population in West Bengal. In the winter season of 2021-22, a field survey was conducted across seven regions in Kolkata, Howrah, Asansol, Haldia, Barrackpore, Bardhhaman and Barasat in West Bengal – to assess …

Best practices for deploying and maintaining a low-cost PM2.5 sensor network

Strategically placed sensors can monitor air pollution and provide a detailed picture of air quality and its variability within a region. Low-cost sensors (LCSs) that measure PM2.5 are becoming increasingly popular because of their low cost, ease of use, and portability. However, the portability and low cost come with trade-offs …

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