India has some of the most polluted cities in the world. Rising air pollution is taking a heavy toll on the health and productivity of citizens. With recent studies pegging the death toll due to air pollution at 9 million, we need urgent, effective solutions.
At CSTEP, we are working with state pollution control agencies and the Central Pollution Control Board to scientifically identify the sources of pollution for effective and targeted interventions. With the use of emerging technologies such as low-cost sensors, mobile monitoring, and satellite-based monitoring of air pollution, CSTEP is looking at ways to make data on air pollution comprehensive, robust, and accessible.
The capacity-building measures initiated by CSTEP ensure that state agencies can scientifically assess, interpret, and formulate effective strategies to check rising air pollution.
Long-term trend of PM2.5 over five Indian megacities using a new statistical approach
PM2.5 is one of the major contributors to air pollution in India, resulting in poor air quality and human health issues. The current study explores the applicability of TTAinterfaceTrendAnalysis (an ‘R’ language-based Graphical User Interface package) in estimating the annual and month-wise trends in PM2.5 over five Indian megacities (New Delhi, Kolkata, Mumbai, Hyderabad, and Chennai). The package offers a one-stop solution for various statistical analyses such as data imputation, outlier detection, trend analysis, data smoothing, diagnostic tests, etc.
The International Global Atmospheric Chemistry project comments on the revised WHO air quality guidelines
In 2021, the World Health Organization (WHO) air quality guidelines were revised for six key air pollutants. The new guideline levels for PM2.5 and O3 may be unattainable for many countries due to natural sources and background levels. Reductions in NO2 may increase O3 due to atmospheric chemistry. Regional-specific scientific expertise is necessary to guide local air quality management towards more appropriate WHO interim targets and controls on modifiable factors especially considering atmospheric chemistry.
Seasonally optimized calibrations improve low-cost sensor performance: long-term field evaluation of PurpleAir sensors in urban and rural India
Lower-cost air pollution sensors can fill critical air quality data gaps in India, which experiences very high fine particulate matter (PM2.5) air pollution but has sparse regulatory air monitoring. Challenges for low-cost PM2.5 sensors in India include high-aerosol mass concentrations and pronounced regional and seasonal gradients in aerosol composition. Here, we report on a detailed long-time performance evaluation of a popular sensor, the Purple Air PA-II, at multiple sites in India.
Annual Report 2022-2023
We bring you CSTEP’s Annual Report for 2022–2023.
As we look at the past year, we reflect on collaborations that helped us forge impactful strategies to solve some of the grand challenges that the country faces today. Our world-class research founded on solid partnerships will help the country navigate through critical problems, such as climate risk and green energy transition, to shape a better tomorrow. This Annual Report is a throwback to our endeavours and a testament to our efforts in building a sustainable and resilient future.
Policy Matters [April-June 2023]
A quarterly newsletter featuring CSTEP commentary, publications, events, and other developments.
Missing in Budget 2023: Proactive Steps to Tackle the Rising Air Pollution
Featuring “green growth” as one of its seven priorities, Union Budget 2023-24 announced some encouraging initiatives towards meeting its environmental targets. While many of these would indirectly aid air pollution control – a critical component of green growth – comprehensive proactive steps to tackle the rising air pollution were given a miss.